It is very odd, I added a network drive and can see the files on it. Now I can open some files, but not pdfs. I can open text files and .doc files, but for pdfs I get following error message:
Unable to open document “file:///media/folder/file.pdf”. Failed to load backend for 'application/pdf': libzstd.so.1: failed to map segment from shared object
I tried copying the file onto my drive and opening it then, same problem. I also tried opening this: http://www.africau.edu/images/default/sample.pdf but it also doesn't work. So I can't open pdfs in general. The strange thing is my collegue also has Ubuntu 20.04 and we both have a fresh default install of Ubuntu and he can open it, but I can't. I didn't change anything regarding the document viewer. How can I open pdfs in Ubuntu 20.04?