yes, the TMs are on a GroupShare server.
First tried setting the filter under All Language Pairs and then under a specific language (pictures Filter_01 and Filter_03).
Tried Last modified by first with Contains and then with Equal.
Error lists all language pairs where I tried to translate (picture Filter_02). No access to server TMs, although they were included in Project Settings and Active and I could access the server TMs from the Translation Memories view.
The above relates to GroupShare.
(Sorry, I don't have access to the xml file at the moment.)
Tested creating a filter also on a Desktop installation of SDL Trados Studio 2017.
The result was the same: with a filter (see picture Filter_Desktop), the TM was disabled in the first untranslated segment, with the same error message as in GroupShare (picture Filter_02).
After I’d deleted the filter, the problem no longer occurred and the TM works fine.