Thank you for the information and for setting up XMR, this should stop the NetMQ errors and help to narrow down what is causing the Player to crash. The Activity threshold error is particularly odd if you only have 1 Player process and watchdog process shown in Task Manager, we will have to see if that happens again in the future.
As a test, I would recommend enabling Auditing on your Display and monitoring it to see when it next closes unexpectedly. Once you have a time and date for the close, you can check the Logs around that time to see if there are any other errors your Display is generating when the issue occurs.
To enable Auditing on your Display, simply go to the
Displays option in your CMS, click the button at the end of the entry for this Display and choose Edit. In the Edit Display window that opens, go to the Advanced tab and set a date for the future in the
Auditing Until fields and save to confirm.