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We tried a workaround and was able to fix the above issue, just retire your device from MDM and reconfigure/enroll to email it will again set the restriction policy for screenshot not allowed.
Please submit an error report to the technical team via Samsung members app > get help page > error reports section.
Choose one of the categories, and type the issue that you're facing to them, but make sure to send your device's logs.
To send the device logs, please follow the below:
Press and hold Samsung members Icon > Then tap on Error reports > Select category of your report > Make sure that "Send Log Data" is selected to help resolve your inquire > Describe your problem in details > Change the frequency to whatever you prefer > Then send it.
For more information regarding, you are welcome to visit our website and watch tutorial sending logs by following the link below: