
Good afternoon!
Thank you for your response and assistance!
Unfortunately, you are describing a straightforward scenario, and your suggestions do not help.
The issue was first noticed on August 5, 2025, on my main computer running Windows 11 24H2.
Prior to August 5, 2025, everything worked correctly. No changes were made to permissions, links, browsers, or their settings.
Later, I tried performing the same actions on another computer of mine running Windows 10, as well as on a friend’s computer running Windows 11.
The same issue occurs on all devices.
When opening the files in the desktop version of Excel, the links update correctly.
For compatibility with Excel Online, no scripts, macros, or add-ins are used.
The error appears specifically on the Excel Online web page.
Today, an interesting behavior was observed:
If I change the region setting in the Excel Online file synchronization for that file starts working again.
However, if I close the file and reopen it, synchronization stops working — and I need to change the region again to restore it. The specific region selected does not matter — any region works.
Please help me fully resolve this issue.