Hi Nico ,
I am Lyn, an Independent Advisor and a fellow Microsoft user. Here to assist you in solving an issue.
Disable Protected View in Excel by doing the following:
Go to Excel.
Cick File > Options > Click Trust Center > Trust Center Settings > Protected View
Uncheck Enable Protected View for files originating from the internet.
Close Excel and reopen the file you wish to print.
Hope that helps. Let me know how it works.