error: unable to create file ....: Invalid argument

I recently passed Xubuntu from 16.04 to 20.04. A simple command like:

git pull

generates the following errors (all similar among them):

error: unable to create file Template/images/N<X.pdf: Invalid argument
...

I guess because there are special characters in some of the files (specifically the characters < and >). I had no problem with XUbutnu 16.04 and now I do not know how to download the file that I need. Any suggestion or walkaround is appreciated.