Error: pre-receive hook declined

Dear Subgit Support.
Since last week we all of our subgit hooked project fail thir merge, pushrequests, with eg.
error: failed to push some refs to ‘https://git.int.compax.at/aax2mm/db/Schemas/aax2mm.git
To https://git.int.compax.at/aax2mm/db/Schemas/aax2mm.git
! refs/heads/master:refs/heads/master [remote rejected] (pre-receive hook declined)
Done