Classic flag error

after the last update i can’t install or update any snap because i get this error:

 cannot install "intellij-idea-ultimate": classic confinement requires snaps under /snap or
       symlink from /snap to /var/lib/snapd/snap

does anyone have any idea how to fix this?

system specs:

snap     2.51.3-2
snapd    2.51.3-2
series   16
manjaro  21.1.0
kernel   5.13.5-1-MANJARO


sudo ln -s /var/lib/snapd/snap /snap

and then try installing it again …