We have just upgrade to version 2.2.1 from 2.0.0, from the .zip file.
After this our dashbord fails to start with a Error 500.
From looking on the forum it looks similar to Dashboard fails to start Error 500 - Ironman Software Forums
If I change it from the “Default” environment to “7.0.3” there is no difference, but if I change to “5.1.17763.1432” it will start.
The environment entry for “7.0.3” looks correct, and the path can be access/started.