Operation blocked by access control error after update on uploading files larger than 20 mbs

The files server was working fine but after update, “Operation blocked by access control” error is being shown when trying to upload files larger than 20mbs. All the files smaller than that size upload successfully. As for logs, there is much output being shown about this error.

Almost all the settings were the default ones that are configured during installation. I tried poking around to find the problem but to no avail.
Can somebody help?
If you need any information please type and I will try my best to provide that info.

I experience the exact same issue. Were you able to solve it?