Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Hi Omer,
I am Dave, I will help you with this.
1
Use this tool from Microsoft to remove all remnants of any previous Office Installation:
https://aka.ms/SaRA-officeUninstallFromPC
Restart (not shut down) your PC
Go to https://account.microsoft.com/services/ and re-install Office from there
2
If that does not solve the problem, then you may need to follow the steps on the link below, in the Command Prompt section to remove an old Office Pro Plus licence key and then install 365.