when I try to import any data into my vault in Bitwarden Lite (Version 2026.4.0), I get the “An error has occurred.” error message. When looking into the browser network tab, I see that the “/api/ciphers/import” endpoint returns a “402 Payment Required” HTTP status code, although I imported a license file.
The license file is issued for the same email address as the email I’m using in the Bitwarden account. I also restarted the container several times.
I also contacted the Bitwarden support about this issue, but managed to pin it down to the sqlite DB provider.
After some unsuccessful attempts to configure the log levels of the application, I switched to the mysql DB provider, which fixed the issue. The sqlite provider seems to be buggy.
The exception handling code of Bitwarden does not really help here, because every ApplicationException is translated to a 402 Payment Required response, even technical exceptions like DB provider bugs. The exception message is also swallowed by the application, which makes it even harder to debug without setting up a development environment.