RH 2020 - Translation hangs

Hello everyone, 

I'm having trouble with the translation process for a project I'm managing.

I'm using the manual translation, so I export my XLIFF files, send them to our translation agency and reimport them back usign RoboHelp.

The problem I'm having is that the import process just hangs: I have the "importing" toast message in bottom right but the process does not complete and, after waiting for almost half an hour, the notification simply disappears...

I don't know what's causing this: I tried importin a smaller chunk of Xliff files and it worked correctly. 

When I try to import all my 206 files, it simply hangs...

The mapper file is in the folder where the tranlsated topics are, so that should be ok.

Is there any sort of log I can check?

Thank you

P.S. For the Adobe guys, the documentation about translation could use a little more info... just sayin' 😉