Hi, sorry for the late reply.Thanks. It will take awhile to get behind the issue because you are not the only one with the same problem.
Macs are always a bit tricky due to Apple changing a lot between macOS versions and new MacBooks.
Can you also provide more information about your Mac and your graphic card, please?
It's an early 2011 Macbook Pro, running High Sierra 10.13.6, 2.3 Ghz Intel Core i5 and an Intel HD Graphics 3000 512 MB graphic card. Worked everything fine with previous episode.
Thanks