Fixes updated versions of dependencies (!160) · Merge requests · LHCb Core Software / lb-nightly-builds-frontend

After !159 (merged) we started to suffer some problems

errors in the logs possibly related to https://github.com/pallets-eco/flask-caching/issues/221
error 500 when trying to log in (change in behaviour of Authlib)

This MR reverts to an older version of flask-caching and fixes the use of Authlib.

Fixes updated versions of dependencies