Resolve common authentication, database, and connection errors when using Supabase integration<\/p>\n","protected":false},"author":591,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"include_on_kodee":true,"footnotes":""},"categories":[293],"tags":[],"class_list":["post-6608","post","type-post","status-publish","format-standard","hentry","category-hostinger-horizons"],"hreflangs":[{"locale":"en-US","link":"https:\/\/www.hostinger.com\/support\/hostinger-horizons-troubleshooting-supabase","default":1}],"include_on_kodee":true,"_links":{"self":[{"href":"https:\/\/www.hostinger.com\/support\/wp-json\/wp\/v2\/posts\/6608","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hostinger.com\/support\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hostinger.com\/support\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hostinger.com\/support\/wp-json\/wp\/v2\/users\/591"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hostinger.com\/support\/wp-json\/wp\/v2\/comments?post=6608"}],"version-history":[{"count":12,"href":"https:\/\/www.hostinger.com\/support\/wp-json\/wp\/v2\/posts\/6608\/revisions"}],"predecessor-version":[{"id":11134,"href":"https:\/\/www.hostinger.com\/support\/wp-json\/wp\/v2\/posts\/6608\/revisions\/11134"}],"wp:attachment":[{"href":"https:\/\/www.hostinger.com\/support\/wp-json\/wp\/v2\/media?parent=6608"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hostinger.com\/support\/wp-json\/wp\/v2\/categories?post=6608"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hostinger.com\/support\/wp-json\/wp\/v2\/tags?post=6608"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
\n
![\"\"](\"https:\/\/www.hostinger.com\/support\/wp-content\/uploads\/sites\/55\/2026\/06\/image-3-300x66.png\")
<\/div>Before you start<\/h2>\n- Confirm you have access to your Supabase Dashboard.<\/li>\n
- For a first attempt at general fixes, follow this guide: Horizons troubleshooting<\/a>.<\/li>\n
- Ensure any external services are online –refer to their status page if needed, and try again later in case of temporary issues or maintenance.<\/li>\n<\/ul>
Resolve authentication and RLS issues<\/h2>
Authentication is the most frequent source of errors in Supabase integrations. Follow these steps to ensure your credentials and permissions are correct.<\/p>
\n- Verify credentials<\/strong>: Ensure the Project URL and Public\/Anon key match your Supabase API settings exactly.<\/li>\n
- Use the native client<\/strong>: Locate the
customSupabaseClient.js<\/code> file in your project. Do not create duplicate files like supabase.js<\/code>, as these often contain placeholder data that breaks the connection.<\/li>\n- Configure Auth providers<\/strong>: In your Supabase Dashboard, go to Auth → Settings. Ensure Email login is enabled. Add later other sign-in methods only if needed.<\/li>\n
- Set URL redirects<\/strong>: In Supabase, go to Auth → URL Configuration, and add your project’s preview and production URLs to the Redirect URLs list.<\/li>\n
- Check RLS policies<\/strong>: If data isn’t loading, check your Row Level Security (RLS) in Supabase. Ensure your policies allow “Read” or “Write” actions for the authenticated user.<\/li>\n<\/ol>
Redeploy your application after updating keys or URLs to ensure changes take effect.<\/p>
If Horizons added extra Supabase files by mistake, do not attempt to delete them. Instead, undo the changes<\/a> that created the additional files, then try a prompt similar to this:<\/p>Use <\/em>customSupabaseClient.js<\/code> for all Supabase calls. Remove any duplicate clients and update imports accordingly.<\/em><\/p>Fix signup and timing errors<\/h2>
If your app users get an RLS violation<\/strong> message in the console immediately after signing up, the app may be trying to write to the database before the user is fully authorized.<\/p>\n- Check the console error to identify the database table that caused the issue. Include that table name in your prompt to get more accurate results from Horizons.<\/li>\n
- Refactor the flow using a prompt in Horizons to move database requests:
\nMove initial database manipulation logic from sign up to initial sign in. Ensure all requests respect RLS and occur only after the user is authorized.<\/em><\/li>\n<\/ol>Fix redirect loops on tab switch<\/h2>
Users may be redirected to the home page when returning to a browser tab. This happens when the app checks the session before Supabase finishes re-validating it.<\/p>
Update the visibility logic using a prompt like this:<\/p>
Update the Supabase logic using<\/em> visibilitychange<\/code> to check authentication state. Ensure the user session is fully acknowledged before any route redirection.<\/em><\/p>Restore missing credentials<\/h2>
If every action triggers a Missing API Key<\/strong> error, the connection between platforms may have desynced.<\/p>\n- Reconnect<\/strong>: Disconnect and then reconnect your Supabase project within the Horizons dashboard to refresh the API file.<\/li>\n
- Redeploy<\/strong>: After updating keys, redeploy your application to ensure the new environment variables are active.<\/li>\n<\/ol>
If you can’t clearly locate or replicate the issue, check the Supabase logs for further details, matching the timestamp with the time when the issue may have happened.<\/p>
Troubleshooting builds and dependency errors<\/h2>
If the Hostinger Horizons preview fails to start or npm install<\/code> hangs after you add Supabase-related libraries, it usually indicates a version conflict.<\/p>\n- Pin stable versions<\/strong>: Ensure your
package.json<\/code> uses specific, stable version numbers for libraries instead of broad ranges.<\/li>\n- Resolve conflicts via prompt<\/strong>: Use the following prompt in the Hostinger Horizons editor:
\nResolve dependency conflicts without modifying <\/em>vite.config.js<\/code>. Keep only essential packages and prefer stable versions.<\/li>\n- Revert build config changes<\/strong>: If an AI-suggested tool modified your Vite configuration, revert to the last working version and ask the assistant to implement the feature without altering core build settings.<\/li>\n<\/ol>
In addition:<\/p>
\n- Avoid adding heavy or complex packages that may cause the installation process to stall.<\/li>\n
- Do not manually edit
vite.config.js<\/code>, as this can lead to persistent build failures.<\/li>\n<\/ul> <\/p>
By following these steps, you can maintain a stable connection between your legacy Supabase backend and Hostinger Horizons.<\/p>
NOTES<\/strong><\/p>\n- You can get further support on the integration between Horizons and Supabase by clicking Ask Kodee <\/strong>on the Horizons platform and sharing the details and timeframe of the issue at hand.<\/li>\n
- For support regarding internal Supabase database behavior, refer to the Supabase documentation<\/a> or contact<\/a> them.<\/li>\n
- For practical help directly in your project, consider a reaching out to a developer<\/a>.<\/li>\n<\/ul>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n","protected":false},"excerpt":{"rendered":"
Resolve authentication and RLS issues<\/h2>
Authentication is the most frequent source of errors in Supabase integrations. Follow these steps to ensure your credentials and permissions are correct.<\/p>
- \n
- Verify credentials<\/strong>: Ensure the Project URL and Public\/Anon key match your Supabase API settings exactly.<\/li>\n
- Use the native client<\/strong>: Locate the
customSupabaseClient.js<\/code> file in your project. Do not create duplicate files likesupabase.js<\/code>, as these often contain placeholder data that breaks the connection.<\/li>\n- Configure Auth providers<\/strong>: In your Supabase Dashboard, go to Auth → Settings. Ensure Email login is enabled. Add later other sign-in methods only if needed.<\/li>\n
- Set URL redirects<\/strong>: In Supabase, go to Auth → URL Configuration, and add your project’s preview and production URLs to the Redirect URLs list.<\/li>\n
- Check RLS policies<\/strong>: If data isn’t loading, check your Row Level Security (RLS) in Supabase. Ensure your policies allow “Read” or “Write” actions for the authenticated user.<\/li>\n<\/ol>
Redeploy your application after updating keys or URLs to ensure changes take effect.<\/p>
If Horizons added extra Supabase files by mistake, do not attempt to delete them. Instead, undo the changes<\/a> that created the additional files, then try a prompt similar to this:<\/p>
Use <\/em>
customSupabaseClient.js<\/code> for all Supabase calls. Remove any duplicate clients and update imports accordingly.<\/em><\/p>Fix signup and timing errors<\/h2>
If your app users get an RLS violation<\/strong> message in the console immediately after signing up, the app may be trying to write to the database before the user is fully authorized.<\/p>
- \n
- Check the console error to identify the database table that caused the issue. Include that table name in your prompt to get more accurate results from Horizons.<\/li>\n
- Refactor the flow using a prompt in Horizons to move database requests:
\nMove initial database manipulation logic from sign up to initial sign in. Ensure all requests respect RLS and occur only after the user is authorized.<\/em><\/li>\n<\/ol>Fix redirect loops on tab switch<\/h2>
Users may be redirected to the home page when returning to a browser tab. This happens when the app checks the session before Supabase finishes re-validating it.<\/p>
Update the visibility logic using a prompt like this:<\/p>
Update the Supabase logic using<\/em>
visibilitychange<\/code> to check authentication state. Ensure the user session is fully acknowledged before any route redirection.<\/em><\/p>Restore missing credentials<\/h2>
If every action triggers a Missing API Key<\/strong> error, the connection between platforms may have desynced.<\/p>
- \n
- Reconnect<\/strong>: Disconnect and then reconnect your Supabase project within the Horizons dashboard to refresh the API file.<\/li>\n
- Redeploy<\/strong>: After updating keys, redeploy your application to ensure the new environment variables are active.<\/li>\n<\/ol>
If you can’t clearly locate or replicate the issue, check the Supabase logs for further details, matching the timestamp with the time when the issue may have happened.<\/p>
Troubleshooting builds and dependency errors<\/h2>
If the Hostinger Horizons preview fails to start or
npm install<\/code> hangs after you add Supabase-related libraries, it usually indicates a version conflict.<\/p>- \n
- Pin stable versions<\/strong>: Ensure your
package.json<\/code> uses specific, stable version numbers for libraries instead of broad ranges.<\/li>\n- Resolve conflicts via prompt<\/strong>: Use the following prompt in the Hostinger Horizons editor:
\nResolve dependency conflicts without modifying <\/em>vite.config.js<\/code>. Keep only essential packages and prefer stable versions.<\/li>\n- Revert build config changes<\/strong>: If an AI-suggested tool modified your Vite configuration, revert to the last working version and ask the assistant to implement the feature without altering core build settings.<\/li>\n<\/ol>
In addition:<\/p>
- \n
- Avoid adding heavy or complex packages that may cause the installation process to stall.<\/li>\n
- Do not manually edit
vite.config.js<\/code>, as this can lead to persistent build failures.<\/li>\n<\/ul><\/p>
By following these steps, you can maintain a stable connection between your legacy Supabase backend and Hostinger Horizons.<\/p>
NOTES<\/strong><\/p>
- \n
- You can get further support on the integration between Horizons and Supabase by clicking Ask Kodee <\/strong>on the Horizons platform and sharing the details and timeframe of the issue at hand.<\/li>\n
- For support regarding internal Supabase database behavior, refer to the Supabase documentation<\/a> or contact<\/a> them.<\/li>\n
- For practical help directly in your project, consider a reaching out to a developer<\/a>.<\/li>\n<\/ul>
\n\n \n\n\n\n\n\n\n \n\n\n \n\n\n\n\n\n\n \n\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n","protected":false},"excerpt":{"rendered":" - For support regarding internal Supabase database behavior, refer to the Supabase documentation<\/a> or contact<\/a> them.<\/li>\n
- You can get further support on the integration between Horizons and Supabase by clicking Ask Kodee <\/strong>on the Horizons platform and sharing the details and timeframe of the issue at hand.<\/li>\n
- Resolve conflicts via prompt<\/strong>: Use the following prompt in the Hostinger Horizons editor:
- Redeploy<\/strong>: After updating keys, redeploy your application to ensure the new environment variables are active.<\/li>\n<\/ol>
- Reconnect<\/strong>: Disconnect and then reconnect your Supabase project within the Horizons dashboard to refresh the API file.<\/li>\n
- Use the native client<\/strong>: Locate the