I have just had the same issue
There’s two ways to slove that
1- use --no-sandbox arg when you execute your appImage juste like that
$ cursor.appImage --no-sandbox
Normally that will solve your probleme
otherwise try to give necessay access to these directory
$ sudo chmod 4755 /tmp/.mount_cursormtBVFd/chrome-sandbox
$ sudo chown root:root /tmp/.mount_cursormtBVFd/chrome-sandbox
that worked for me on my Ubuntu 24.04