Activation Issues

[Windows 11]

My Surface pro 8 was activated and working for few years. All of a sudden it says Activate Windows. I've tried everything to activate it and followed all the instructions its not reactivating. I havent done or changed anything. The Computer came activated with Windows 11 when it was purchased. I even removed all the devices under manage devices on the MS setting online and yet its still not working. Please help.

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