Light Jockey 2 midi Error

“error there is not enough memory available for this task. Quit one or more applications to increase availability”
We are using Light Jockey 2 with a small Akai midi controller. It has worked fine in the past, but recently we get this error message & the midi controller won’t work. Any ideas on a fix for this problem? This computer is used for lighting only. I don’t think it has internet availability.

How much RAM does the pc have and how much is used?
(Use taskmanager to look)