I am getting this event each time this timer job executes.
The Execute method of job definition Nintex.Administration.Common.ConsumptionLicensingJob.NintexSynchronization (ID c41f3904-383d-40c0-8ffc-bbd1e5e62a2a) threw an exception. More information is included below.
For my Problem
Upon checking the latest logs, it appears that there is another site some sites which is also denied access.
I would advice to check all the sites which are set to 'No access' in Central Admin, enable them and then wait for the next job run.