Oct 22 00:30:52 Jen Pangrazio kernel: [10731315.490000] SM cannot be associated on AP[00:04:56:c0:ef:78] F=5210 11naht20. Reason: 16 (INA RETRIES EXHAUSTED)

What is wrong here?

There are descriptions of some of the error codes in this knowledge base article:

The recommendation for INA RETRIES EXHAUSTED is:

Conduct a site survey at the SM to determine if poor link quality is causing a lack of INA response being received at the SM

Is this a new installation, or has it been running fine until recently?