When using rdwoksv8 with the external AI 2018 plugin, it fails to start

I tried using the AI plugin as an external add-on, and it worked on the first day of trial. But when I tried again the next day, it stopped working. When I click Process, the screen just flickers and nothing happens — rdwoksv8 does not even start at all. A few days later, I reinstalled the operating system, AI, and V8 on another computer and tried again. It worked initially, but after a few hours, it stopped working again. What could be the problem?