Hello ,
Good to see you in Microsoft Community.
I have checked in multiple accounts that this synchronization feature works correctly and from the error messages it seems that the problem is most likely an anomaly in the relevant file in the browser client configuration file. You can try the following steps:
1. Repair the Microsoft Edge browser
"Win" logo key + "I" open Windows Settings > Apps > Apps & Features > Microsoft Edge > Modify > Repair*.*
2. Clear sync data
Click “Disable Sync (Clear Data)” on the edge://sync-internals page. The location of this button may change due to the page layout, so please look for it carefully and check.
3. Optimize network connection
It is also not ruled out that it is due to network issues, you can optimize your connection to Microsoft servers by following the steps below. "Win" logo key + "Q" to open the search box, type 'ncpa.cpl', press Enter to open the "Network Connections" window, select your network adapter, right-click it > "Properties", double-click "Internet Protocol Version (TCP/IP)", then check “Use the following DNS server address", and*****type* "4.2.2.1" in "Preferred DNS server", and type "4.2.2.2" in "Alternate DNS server", then press OK*.*
If your other network applications fail to work properly (unable to load or slow connection) due to the above changes, you can set it to "Obtain DNS server address automatically" after the problem is fixed.
If anything is unclear, please do not hesitate to let me know.
Best Regards,
Mosken_L - MSFT | Microsoft Community Support Specialist