Have you used this same version of Hit Film in the past without any errors? Wondering if the latest version is different perhaps.
Other things to check would be the GPU temperature and perhaps running a benchmarking tool to stress it and see if you get artifacts or crashing. Furmark is the most intense but 3D Mark would be fine for basic functionality.
You might also try reverting to a much older driver as perhaps several of the latest Nvidia drivers have this issue.
A bus station is where a bus stops. A train station is where a train stops. On my desk, I have a work station…