Load Case Manager does not work

Hello, I have a FE model that runs fine if I hit the "Run This Study" button.

 

However, when I try to set up the Load Case Manager, the program does not run the simulation. When I click "What's wrong" on the simulation tree, I get the message "The following load cases have failed to run..." but it does not tell me why.

 

 

I tried closing/reopening the file, re-meshing, deleting the load case manager and recreating it.

 

Thanks!