Cannot Install Fontself / Stucks

Hello. I am trying to install the 3.4 update of fontself and something seems to go wrong.
I am using the latest ai version and catalina as well.
The installer always stucks on “Destination select”(Screenshot attached)
Any workaround on this?

04%20PM 42%20PM 30%20PM

Hey, we never heard of such an issue and unfortunately no idea where it comes from (admin rights to write on disks, unusual disk partitions, or else ???). Maybe worth trying on a different user session too.