After updating to goose I cannot run MSX roms.
I tried to assign the core manually, but there are no MSX in cores list anymore.
Goose was designed to have as little bloat as possible so it was made with a base pack of cores, if there is something else you would like you can find them here
MSX can be found in the Console and Computer pack
You can also use the on-device core download. Make sure your device is connected to Wi-Fi then press SELECT on your content, choose system core and at the top should be a Core Download option.