ok, last trial before I recommend to through your computer out of the window
...
Did you try to log on on your laptop with your colleagues user, and vice versa?
In which of the two cases do you get the error?
If it is Computer-related, you may delete your settings and copy those from him/her (files under C:\Users\<your user ID>\AppData\Local\EPMOfficeClient , but make a backup first especially of the connection file)
If it is user related, you either create yourselve another user or you open up an OSS message








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