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myeasycms-v2/docs/troubleshooting/troubleshooting-authentication.mdoc
Giancarlo Buomprisco 7ebff31475 Next.js Supabase V3 (#463)
Version 3 of the kit:
- Radix UI replaced with Base UI (using the Shadcn UI patterns)
- next-intl replaces react-i18next
- enhanceAction deprecated; usage moved to next-safe-action
- main layout now wrapped with [locale] path segment
- Teams only mode
- Layout updates
- Zod v4
- Next.js 16.2
- Typescript 6
- All other dependencies updated
- Removed deprecated Edge CSRF
- Dynamic Github Action runner
2026-03-24 13:40:38 +08:00

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---
status: "published"
title: 'Troubleshooting authentication issues in the Next.js Supabase kit'
label: 'Authentication'
order: 2
description: 'Troubleshoot issues related to authentication in the Next.js Supabase SaaS kit'
---
## Supabase redirects to localhost instead of my website URL
This is most likely an issue related to not having set up the Authentication URL in the Supabase settings as describe in [the going to production guide](../going-to-production/supabase);
## Cannot Receive Emails from Supabase
This issue may arise if you have not setup an SMTP provider from within Supabase.
Supabase's own SMTP provider has low limits and low deliverability, therefore you must set up your own - and only use the default Supabase's one for testing purposes.
## Cannot sign in with oAuth provider
This is most likely a settings issues from within the Supabase dashboard or in the provider's settings.
Please [read Supabase's documentation](https://supabase.com/docs/guides/auth/social-login) on how to set up third-party providers.