Everything was working fine until it wasn't

Hello people. Hope this is useful …

I have tried to sort this error out, but no joy.

Roms all there and it seems fine.

Retroarch doesn’t work anymore, somehow it lots a lot of its menu. Wish I go do a reset button, because when it arrived, it was working fine!

Any idea how to fix these errors? Any help welcome, I am new to this, but willing to get it done right. Ta

B

The libretro core you chosen is missing. Check your /tmp/cores in SSH maybe they are not copying across for some reason. Try resetting all binaries and scripts in ES Danger Mode.