I'm getting a Twig error ...
Uncaught exception 'RuntimeException' with message 'Unable to write in the cache directory (./cache/twig/69).
but only ever in that 1 hexadecimal directory listed above. If I then set the permissions on that folder to 0777 and also set the permissions on the files it contains, it works correctly but only for a few days. I then have to do the same fix and so on and so on. None of the other directories in the twig folder are affected. Any ideas?