I eventually discovered, via a YouTube video, that I needed to first go to the Microsoft store to download the Dropbox application I needed. It was different from the one you sent me, but this one worked. 

I tried installing the Dropbox application you sent, but it said this app couldn't run on my computer, but that I would have to check with the publisher to find a version that works for me.
I will ask my computer guru to sort this problem out for me.  I'm sure he'll know how to find the right version.
Thanks for trying to help.

 LibreOffice synced fine from my Linux computer, but since I had to change to Windows 11, that's when my problems started. Is it the change of OS that's caused this problem?

Mora_C wrote:

I have LibreOffice installed, but it isn't syncing with Dropbox. How do I get it to do that?

You don't sync LibreOffice with Dropbox. You install the Dropbox application on your computer, sync your files so they're stored in your local Dropbox folder, and then just open them directly from the Dropbox folder.

I have LibreOffice installed, but it isn't syncing with Dropbox. How do I get it to do that?

Mora_C wrote:

It's only giving me tthe option to downlad to Windows Excel for the web. I want it to download to LibreOffice Calc, which I can open on my computer ...

It sounds like you're trying to open files directly from the website. Dropbox supports that for Office files, but not LibreOffice. If you have the Dropbox application installed and syncing, your files should be in your local Dropbox folder. Try opening the files directly from there instead.

Hi Rich

Thanks for your response.

I can't get the error page up again, but I did note what it said:

"Error.  Something went wrong. Don’t worry, your files are still safe and the Dropbox team has been notified. Check our Status Page to see if there is a known incident, our help centre and forums for help, or go back to home." 

I will try the instructions you sent, once I find where to do it. Window 11 is new to me as I've used Linux for years, so I'm still learning my way round it. I'll get back to you later afterI tried to do as you said.

I eventually found the first message. It said 

".ods files are supported but something went wrong."

With a box saying 'download' under the message. It's only giving me tthe option to downlad to Windows Excel for the web. I want it to download to LibreOffice Calc, which I can open on my computer, but only as a blank spreadsheet.

I then tried with another spreadsheet and it opened showing the data on it, but I couldn't save it to Dropbox.

Mora_C wrote:

I logged into Dropcox and tried to open my spreadsheet in LibreOffice Calc, but it failed to download and showed an error meaage.

What, exactly, is the error message? Provide a screenshot if you're able to. Also, is the file marked as Available offline, or Online-only? If it's Online-only, right-click the file and select Make available offline, wait for it to sync, then try to open the file again.