oc 22.214.171.124 + vqmod 2.4.1
front-end working just fine, but vqmod in back-end stopped logging any errors - and believe me, there are usually tons of them.
tried to re-install vqmod, but it said it is already installed.
changing permissions to folders and files, no result.
I am not 100% sure, but it seems problems begain after changing server and/or upgrading vqmod to latest version.