MS Project - error message when checking "Critical tasks"

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Nov 15, 2021
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Hi, does anyone know why I get the error message "The argument value is not valid. Verify that the value is spelled correctly, and that it is of the type this argument expects". This happens even with the template projects. Then the task bars disappears. So frustrating ...
 
Joined
Nov 15, 2021
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Hi again, problem solved by changing the Windows region format to my local language. Finally ...
 

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