Checking the runs always barfs errors on the screen that something went wrong it says to contact support which is basically impossible (jokes on me i guess?) so here goes nothing.
If you contact support, you may be asked to provide the following details:
Did you mean that after you click on the exclamation mark beside each flow, you will recieve this error?
Is this happening to every flow? Or just one flow?
Would you try to create some new ones to test? Also, what if we change to another different environment?