History view via browser - link broken in non-root setup

i have setup seafile pro server 6.0.2.
running behind apache in a non-root directory, eg:

https://www.example.com/cloud/

on my desktop (mac os) i can browse files etc. when i right click an choose “file history” the history page in my browser opens. but then the directory is doubled and i get an “file not found” (Es tut uns leid, aber die angefragte Seite wurde nicht gefunden.)

https://www.example.com/cloud/cloud/repo/file_revisions/abcd1234/?p=/test.txt

so the path is doubled.

markus