I have just updated to the new Mojave 10.14.6. I have installed and deleted the Dropbox app about 15 times in hopes that it will sync. I will then attempt to link the dropbox account and it will commence the process of linking and then just kick me out to set it up again. I have attempted more than 15 times and am very frustrated as my files have not been synced in over 3 days.
I have also contacted apple to ensure that there is not anything on my computer preventing Dropbox from operating correctly. I do not have any thing that would prevent dropbox to sync.
I have also emailed the support at dropbox twice and have no response.
As a first step, could you please check if there's a third party app that could be blocking the startup process? I'd also recommend disabling your antivirus or security program, as well as ensuring that you've configured your firewall to work with Dropbox.
If you're still having trouble with this though, please don't hesitate to nudge me and I'll make sure to get back to you as soon as possible. Thanks!
In order to have a more in-depth look on this, I'd recommend moving this discussion to email due to account-specific info required.
I was able to locate your ticket and can see that you're in touch with a member of my team. I've made sure to pass your comments along to them and as soon as they have more info, they'll get back to you via email.