We need to collect the trace archive and decode it to know more. Bit tedious 略.  If you upgrade it to 16.9.x version or above, the smart license feature will be enabled automatically with an evaluation period of 90 days. post that even if it expired ...

It is a notification that shows that the switch has downloaded the necessary certificates for communication with PnP server. Please disable pnp . you can do it via "no pnp profile <profile name>"

do you have: >crash file firing the issue under the crashinfo? >any logs prior to the reload ?

I think it is due to a faulty console cable or incorrect baud rate in the putty. please check both of them