2010 Mac Mini suitability to run GarageBand (NOT a GB question! Please leave it here!)

Can we try this again? I posted this question two days ago in this section but somehow it got unceremoniously and without warning shifted it to the GarageBand section, where, predictably, just about nobody has answered it because it's not technically a GB question, it's a question about Mac Mini suitability to use the software.

My kids have started to experiment with Magic GarageBand on their 2010 Mac Mini.

Trouble is when they try to play their projects in Garageband they get an error message:

"Part of the project was not played

This project has too many real instrument tracks to be played in real-time.

To optimize performance, see the 'Optimizing GarageBand performance' page in GarageBand Help."

Is just five tracks really expecting too much from a 2010 Mac Mini? Would adding extra memory help?

Thanks.