If you see " requires signing in with GitHub" and can't get past it, it's usually because your organization uses GitHub SSO and your GitHub account no longer has access to the linked GitHub organization. When you lose access to that GitHub org, your Sentry access through it stops working.
Things to try:
If you still have access to the GitHub organization, re-authorize Sentry: in GitHub, go to Settings > Applications > Authorized OAuth Apps > Sentry and make sure access to your organization is granted, then try signing in again.
If your organization does not require SSO, you can sign in with your email and password from the general login page: https://sentry.io/auth/login/
If you've never set a password (you always signed in with GitHub), set one first from the account recovery page: https://sentry.io/account/recover/
If you're the organization owner or admin, or none of the above gets you back in, contact [email protected] and we'll help restore access.