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Self troubleshooting

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Version

1.8.2

Description

I updated to version 1.8.2 and now a get a message "Error - Unauthorized action or expired link" every time I log in. After I hit "login" it prints this error. In the log of my webserver I see a line "Error | 403 | POST /admin/ HTTP/1.0". When I enter domain.tld/admin I'm in the backend. So login is successful but the post method throws an error. I activated debug mode but there wasn't any hint what could be the problem.
This happens on two installations of Yourls. I use PHP 8.0.11 and MySQL 8.0.26, tested with Chrome and Edge on Windows 10 and 11.

Expectation

Successful login without error message

Reproduction steps

No response

Context

No response