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Hello,
This error usually occurs when a network issue prevents your device from connecting to the OneDrive cloud servers.
First, restart your Wi-Fi router, reconnect to the network, and check whether the issue is resolved. If the problem persists, try enabling the recommended TLS Security protocols: TLS 1.0, TLS 1.1, and TLS 1.2. (This is the second step as recommended by AI below).
If the issue continues, make sure your device is not connected through a proxy server.
To check this, go to Start > Settings > Network & Internet > Proxy.
Under Manual proxy setup, turn off Use a proxy server if it is enabled.
Then, restart your computer and reset OneDrive.
Another Method,
Open a CMD admin window.
Run the Network reset commands one by one and click Enter for each command.
netsh winsock reset
netsh int ip reset
netsh advfirewall reset
ipconfig / flushdns
ipconfig / release
Once completed, restart your computer.