One or more errors occurred when importing TMs into Groupshare

Some days ago we updated Trados Studio 2017 to the SR1 - 14.1.10018.54792 Version and we updated Groupshare 2017 as well to the 14.2.7902.0 - SR1 version. Since then, it is not possible to import any tmx into Groupshare, regardless of language or size. The following error "One or more errors has occured" always appears. We can import the tmx into a local sdl translation memory, so the problem must be with Groupshare.

Has anybody had this problem or know how to solve it? We tried the upgrade TMs option and it still gives the error.