Plesk file manager freezes when uploading a file

Hello,

I'm facing a very frustrating situation with Plesk file manager. Each time I try to upload a file (that is not that big ~45Mb) the progression bar freezes at 86-87%.
The whole behavior is quite weird as the progression bar starts at 73% then goes slowly until 86-87% and then nothing.
I've tried a couple of times on different domains with different connections and the problem remains the same.

I cannot actually use an FTP software so does anyone have an idea on that?

Thanks in advance.