Insufficient memory available

[b8vr]

Try updating Pocl and how much ram you got?

MemTotal :2024076

The issue is your command, it's faulty:
The -r is for a rule file, but you are supplying your hash file as the rule file, meaning you're not supplying any hashes for the command. And the crackstation.txt.gz wordlist need to be unpacked before being supplied as a wordlist.