Unable to log into Dropbox App. "Previous sign in interrupted. Please try again"

although I am pretty rusty at troubleshooting problems like this, It looks like Dropbox and Dropbox Update are not configured with viable internet IN ports. That is beyond my grey cells and would appreciate some help. I'll check back tomorrow.

Hi MikeDyr, thanks for the details. I think it would be best to contact the support team since they have more tools and steps available to troubleshoot this matter for you.
You can submit a ticket to the team via this link while logged into your Dropbox account.

DropBox is using Port 17500 which is for LAN. 

I set traps on all the dropbox port activity

INTERNET OUT using  a TCP/UTC protocol with no ports/address/ICMP assigned is working  - trap verified successful

INTERNET IN using  a TCP/UTC protocol with  port 17500 is not trapping  neither success or fail

The DEFAULT RULE  is both in and out and it is not trapping

Given what I understand the problem is likely in the assignment of Ports

I checked the post 17600 17603 are open and Norton is no blocking them

I shutoff the Norton firewall rebooted and tried to link desktop Dropbox but it failed in the same loop as below. Then I went in and made sure that all Dropbox related service were set to ALLOW. Saved, then rebooted.  Tried again to link desktop Drop Box with the same failure.

Loop

The screen displays Welcome and sign it. Press sign in with Dropbox . Then the "Login successful" screen shows for a second followed by third screen appears stating "Previous sign in interrupted".  If you try again it just loop back to the this screen.

If you try to exit you are informed you should try again. If you do you loop back though all three screens.

Hannah​ The "agent" I'm in contact with has now twice asked me to repeat steps I've already attempted to address the problem, despite my literally providing a complete list of everything I've tried both here and in the e-mail chain - and there are two other people on this thread with the exact same problem that Support hasn't been able to help. Either I'm talking to Clippy or your specialists need to wake up.

Hey shawnedrei, thanks for your feedback here.

From what I can see, your case was sent to our specialists.

If you have any concerns or need further assistance, please make sure to continue working on the issue with the agent you're in contact with.

They'll be able to provide additional troubleshooting steps and info for you and hopefully your issue will get resolved really soon!

We appreciate your feedback, though, and I'll make sure to pass your comments along to our team.

Don't get your hopes up, Support just transferred me to some bot that keeps asking me to repeat steps I've already taken. I don't think we're going to get any real help here.

Hey Abrahamconstruction, I just checked your ticket and I can’t see your reply to Megan either. 

Can you please clarify what you mean when saying that it’s coming back, or send me a screenshot of what you see instead after responding to her via email? Just make sure your email address isn’t visible in your screenshot.

Thanks for reporting this here, MikeDyr, and I’m sorry to hear about your experience. 

Can you clarify what settings you changed exactly on your Smart Firewall? Can you try disabling it for a little bit, in case you haven't already, and restarting your device then?

If that doesn't help either, I'd like a screenshot of the crickets you're seeing now.

I’ll be able to further assist this way.