I'm getting this error message 

504 Gateway Time-out

when I try to login through the desktop app. I can log in through web browsers but not the app. This is a real inconvenience for me. It is only happening on my PC - not any others on my network. I have attempted to uninstall and re install the QB app several times over the course of the last few days but it keeps happening.

Please let me know what I can do to resolve this issue.

Thanks!