What are these empty logs?

[waxmaster_c]

I’v got a dozen confusing empty logs, can somebody explain?

 

[Deleted member 108694]

Those are telling what the priority of the error message is in your case a Priority 3 or 4
Here is a list of severity levels:

Code	Severity	Keyword	Description
0	Emergency	emerg (panic)	System is unusable.
1	Alert	alert	Action must be taken immediately.
2	Critical	crit	Critical conditions.
3	Error	err (error)	Error conditions.
4	Warning	warning (warn)	Warning conditions.
5	Notice	notice	Normal but significant condition.
6	Informational	info	Informational messages.
7	Debug	debug	Debug-level messages.

Have a look here - https://geek-university.com/linux/syslog-protocol-explained/