Despite a not major release, Gitbucket 4.10 is breaking backward compatibility.
Quotes the release note below.
Scala version has been updated to 2.12. Also Scalatra and Slick have been updated to Scalatra 2.5 and blocking-slick 0.0.7 (Slick 3.2.0-RC1).
By this change, plug-ins compatibility has been broken. If your plug-in hasn’t used Slick query, it will be work on GitBucket 4.10 only recompile simply. Otherwise, you have to update your code to use blocking-slick.