The log provides means the SNMP access from the specified source is denied by Policy Manager or access-list rule. Dropping this SNMP Request.
There does not seem to be any access-profile configured is what i see from the provided screenshot of the "show management".
And the drop could be due to any ACL that has been configured and applied at the switch.
The output of snmp counters indicate that there are authentication errors.
It looks like a community mismatch. Please ensure you are using the same community name in the tool and the switch.
Also, please enable the default user and group in SNMP and let us know if that helps!