Anyone know why this could be the case? I have uninstalled and installed and still have the same problem. Keeps popping up asking to sign in. I do it and it pops up again. I know the email and password are correct because I can sign into the dropbox website just fine.

I work collaboratively with a lot of people around the nation and it is much more efficient for me to be able to save documents directly to my dropbox folder instead of uploading it to the website manually each time.

have you tried from a different network?

It works on my laptops and on my phone.

Probably your vpn causing problems. Disconnect from vpn and see if it keeps doing it.

Not on VPN. Wired LAN.

Tried rebooting?

are you running any firewall or antivirus?

Try connecting to a different network. Tether your phone maybe, disable lan, and see if that fixes it. If that doesn't work, reinstall.

What version of the sync client are you using? Or are you just using the web? Business or personal? Are you Oauthing through another app?