Windows Product key genuine but windows not activating.

[Windows 10]

My windows product key is genuine but it's not activating.I reinstalled my Windows 10 Pro from a shop/technician and he said that it was activated.I checked. It was activated. The product key was fine.Then, in a day, it got deactivated. Now, it's not getting activated.Troubleshooting shows this errorSorry the screenshot isn't being uploaded. It's failing.)"We found a digital license for Windows 10 Pro. To activate this device, select Activate Windows."And there's a button below for ACTIVATE WINDOWS.But after clicking on it, it shows this error:"Something prevented us from communicating with

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