Weblate is locked

There seems to be some problem with Weblate:

The translation is temporarily closed for contributions due to
maintenance, please come back later.
The translation was automatically locked due to following alerts:
Could not update the repository.

Warning: the ECDSA host key for 'github.com' differs from the key for
the IP address '140.82.113.3'
Offending key for IP in /app/data/ssh/known_hosts:8
Matching host key in /app/data/ssh/known_hosts:18
Exiting, you have requested strict checking.
Host key verification failed.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.
 (128)

Cheers