I'm seeing a "Reconnecting to the internet, this may take a moment" error on my Windows 10 device.

Question

Hello! Let me say right away that English is not my native language - sorry.
Recently (possibly coinciding with the replacement of the motherboard and processor with new, but identical one to one) - the Dropbox icon became gray and "Connecting..."
Windows 10 Pro (22H2, OS Build 19045.2604) Dropbox desktop app (version 220.4.4126) is giving me the "Reconnecting to the internet, this may take a moment" error message, but if you go to "View sync issues", there is a message "You have no sync issues".
I will say right away that I have read many messages on the forum, on the Internet and have done all possible and even impossible checks and actions, for example:
- deleting cookies and registry entries
  - completely uninstalling the program and reinstalling it
  - installing other (earlier) versions
  - no VPN, no antivirus, firewall disabled
  - ipconfig /flushdns, disable IPv6 and so on
At the same time, the page https://www.dropbox.com/home opens smoothly in the browser and there are no problems with the Internet at all and never have been.
Please help me solve my problem! Thanks in advance!
P.S. Please delete the duplicate topic: https://www.dropboxforum.com/discussions/Welcome/windows-10-reconnecting-to-the-internet-this-may-take-a-moment/827117/replies/827118

Nancy · Answer

Hey Lilitt74! Thanks for posting on our Community and great work on the troubleshooting steps.&nbsp;
After disabling your firewall, did you also restart your computer and the same issue persisted?&nbsp;
How about your current network? Are you connected to your home WiFi, or are you trying to access Dropbox by connecting to a corporate/school network?&nbsp;
Let me know more details and we’ll have a look.

Lilitt74 · Answer

NancyThanks for the quick response!I am a system administrator, this computer is connected directly to the access switch. No firewalls were initially enabled on it and everything worked stably. Then at one point this error appeared. The computer has rebooted more than once, I have tried all the methods to solve this problem...