DB thinks I am offline

No issues with dowloading.  Just with reading pdf's and such, and listening to audio files.  DB thinks I'm offline even while accepting new files and updates to its servers.  So far, that only affects my use of Preview.

Have you tried clearing your browser's cache lately or another browser perhaps Norfolk VHF? 

Do you still get the same error? 

Also, if you access the shared link from this page, does it give you the same error?

SOLUTION:  clear cache on browser, restart computer.

Credit to Walter above, but I wanted it to be clear that of several things he suggested in a single message, this is what worked for me.  I was glum at first, because I still got the error message right after clearing the cache.  I decided to try restarting the computer and now everything works fine again.

Thanks to all for your input. 

Glad to hear it's sorted now Norfolk VHF and thanks for keeping us in the loop too.

See you around the Community and have a lovely weekend!

Unfortunately I have to reinstate this thread.  The problem I had, non-functionality of Preview with the error message that I am offline when I'm clearly not, has returned.  I had functionality for a few days after clearing cache on Google Chrome and restarting, but that no longer works.

Preview works fine on Chrome on my laptop, and fine on this desktop on a different browser. 

[Update:  problem returned after a few months, even on my new Brave browser.]  Ok.  Time to wrap up this thread.  This is not a Dropbox issue.  Like Dropbox, DoorDash relies, apparently, on the browser I use to discern whether I am online. The Google Chrome on my desktop is damaged, and even clearing the complete browser history only works to fix it for a couple of days.  Just as I was still able to update files in Dropbox despite the error message, so here I was still able to order my food despite the warning message.

I downloaded the Brave app, and will have to get used to using it.  Thanks to all for your input.  I learned a lot.

This is a Dropbox issue after all.  It now says, yet again, I am offline (when I'm not, and can perform numerous functions that would require a dynamic connection to work, such as saving updated files).  It happens on both Chrome and Brave.

Am I really the only person with this issue?

Hey Norfolk VHF, sorry to see you're having this issue again.

Do you perhaps have any security apps/extensions on your browser or generally your computer, like an antivirus, firewall, VPN etc. that might be causing this issue?

If you can, please temporarily disable them and let us know what you find.

Thanks, but I have nothing of the kind.  I wanted, before, someone to tell me where and when this error page is activated in DB.  How it wouldn't be superseded when I perform function after function dependent on the very connectivity it is claiming I don't have.