We're getting a "Unable to remove download" error when selecting the online-only option.

Hi there, mathijsw​, let me jump in here! 

As a first step, please let me know the app's current syncing status.

Also, based on the app version that you're using (243.3.6933) it sounds like you have the beta version installed instead of the stable one. That could be the culprit there.

Can you try to uninstall Dropbox from your computer using these steps?

Once you do this, please access your account settings online and then toggle the Early Access setting to Off. After that reinstall the stable version using this link.

I'll be waiting for your update once you try this, to let me know if the behavior remains the same.

If it does, please let me know!

Thank you, Nancy, for your response.

We received a ticket from one of our customers regarding this issue. I then set up a VM where I was able to reproduce the problem.

It doesn’t make a difference whether I restart or perform a clean installation. I’ve mainly been testing with Pages, Numbers, and Microsoft Office files, but the customer also reports that it occurs with Adobe files.

See here:
https://youtu.be/wtL6ZN7kSmM

Hey mathijsw! Thanks for your post. 

Is there any chance that these files are still open on your machine, when you receive this error message? 

Is this happening with all the Pages, Numbers, and Microsoft Office files that you’re using on your computer, or is it specific files that you're mostly having this issue with? 

Have you tried to restart your computer and try to make them online-only again, without opening them first?

Let me know what you find, and we’ll go from there.