FINDA FILAM STUCK appears during print when PLA materials runs out... Help!  

FINDA FILAM STUCK appears during print when PLA materials runs out... Help!

We're using a Core One with an MMU3 attachment and were in mid-print when the FINDA FILAM. STUCK error appeared.

We thought the MMU3 would automatically switched to a different filament when that happened. Currently, the Core One's screen only allows us to Retry. It does not allow us to access the settings to unload/load filament or do any troubleshooting on the machine without resetting the whole thing. 

Here are the questions we have:

1. Why did the MMU3 not switch to the other filament?

2. Why can't you access the menu or have an option to manually switch filaments mid-print?

3.  Is it possible/how do you resume the print if you shut down the machine and turn it back on?...This is what we're considering but haven't gone through with it yet.