Those errors usually occur when you have filled the Notify table.
( Do you have a lot of music or photos? – these are the most common reason the table fills up)
If you restart PMS, wait 2-3 minutes for it to stabilize, then pull the logs,
IF you see “No space left on Device” in conjunction with “Notify” then you have confirmed the table is full.
The resolution is to determine how big the table needs to be and adjust the kernel’s table size.