Help me! Problem with Office 365 PRO Plus with Windows 10 Enterprise 10.0.19041! Error 0x80070005

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I have scrupulously followed the instructions found on the internet page relating to the topic but unfortunately I have not solved my problem.
I would like to specify that:

1. I have 5 personal Office 365 licenses made available by my company
2. At this moment, checking the subscription status on the web on the personal account page, there are only 4 activated licenses (one of which is the one I am trying to activate)
3. I tried to remove the license on both the server and the client and then carry out the installation process again without solving my problem
4. The only thing that I have not been able to do is update Office 365 to the latest version because there is no possibility to perform this update on the company PC. I specify that I am administrator of the pc but I don't know if it is possible to carry out this update in another way.

In order to better analyze my problem, go to the images of the errors found and I provide below the English translation of these messages:

1. Microsoft Office cannot verify the license for this product. Restore the Office application from the Control Panel.
2. There was a problem installing the product key. If the problem persists, try restoring the Office product. (System error: 0x80070005)
3. Microsoft Office 365 plus subscription cannot be verified. Word was unable to verify your Office 365 subscription. Verify that you are connected to the internet and restart the application.
4. No other Office licenses associated with (email address) found

I want to thank everyone for the attention and speed with which you are responding to my problem but as you can understand right now I am a bit desperate!

Thanks to all!