I got error message "Too many users in simulation. Please try again later!" when trying to simulate with a non simulateble battery (CR2032-BS-2-1) as Power source for OP-amps. It would be helpful if the error code is relevant to the error. I use the desktop app for windows v5.8.22.
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
we will fix it at v5.9
thanks