Dropbox Lite - "Can't upload. Please try again later."

Running into the error listed in the topic title. This is a fresh Dropbox Lite install. I've approved the login via email. The app was able to create a folder, but it refuses to upload any files. My storage is not full. I've tried multiple connectivity types (Wifi and cellular). I've restarted the app. No unusual characters are used in the filename. I've tested with a brand new .txt file as well on a different drive; same issue. Doesn't appear to be any status disruptions.

Any ideas? Thanks in advance!