I have the same (or at least a very similar) problem. On a fully up to date xubuntu 20-04 system, when i run evince and click on a link, it fails to follow that link in my browser. This kind of thing happens when you are reading a technical paper and want to follow one of the references and click on the doi or url.
When i click on the link i get a box that i cannot copy from that says: Failed to launch preferred application for category "WebBrowser". Failed to execute child process "/usr/lib/x86_64-linux-gnu/xfce4/exo-2 /exo-helper-2"(Permission denied). Did I say that it is annoying that i could not copy the text in this box!!!!!! The output of the ldd command you asked for is attached. I should also point out that this worked fine under xubuntu 18.04. ** Attachment added: "the output of ldd -r `which evince` that you asked for." https://bugs.launchpad.net/ubuntu/+source/evince/+bug/1869159/+attachment/5400167/+files/xx -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to evince in Ubuntu. https://bugs.launchpad.net/bugs/1869159 Title: Opening a pdf from Zotero in evince, I got "failed to load backend for 'application/pdf': libnss3.so: failed to load shared object mapping segment To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/evince/+bug/1869159/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
