Not connected, not able to persist on disc

Hi,
I’ve recently been encountering Redis not connecting, and getting the following error:

Connection Exception: MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error. (RedisException)
Errors: [
“MISCONF Redis is configured to save RDB snapshots, but it is currently not able to persist on disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.”
]

Could you point me in the right direction to fixing this?
Thanks,
Cheryl