Pinball Brothers know about this issue, and are working on a patch for this.
Workaround for now.: Power off machine, wait 30 seconds and then power on. You may repeat this 1~3 times.
UPDATE! 10/14/2021 - Issue solution found!
The software update will be available very soon. - If black screen is appearing after software update, please contact support for further investigation.
UPDATE! 2/11/2022 - We are still investigating!
Previous update 2.4 - Improved the issue, but not 100% We are still looking into this issue.