Hello Amanuel Abera,
Welcome to Microsoft Q&A forum
The error message “Microsoft Office can’t find your license for this application” usually means Office cannot verify your activation or the installation is corrupted. Here are some troubleshooting steps for you to try to see if it fixes the issue:
Try restart your computer first because this often resolves temporary issues that is happening to your Excel
You should refer to this site on how to use Office repair:
I suggest trying both repair options quick repair first then online repair if quick repair doesn't fix the issue.
Feel free reply back to this post after you have tried the method I provided to update me on this issue, I'll be happy to help.
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