Need Help with Black Screen Issue in Secret World Legends: Upgraded Graphics Card and Now Facing Problems

Hello,

I have decided to play Secret World Legends again, but I am unable to play the way I want to.

I’m having a black screen issue (DX9 / DX11) despite having an excellent setup:

Processor: AMD Ryzen 5 1600X
RAM: 2x8GB DDR4 3200MHz
Motherboard: Asus A320M-K
Graphics card: Sapphire Pulse RX 6600 8GB
Power supply: 550W
Storage: 1TB internal NVMe 3500/3000mb/s + 120GB SSD + 750GB HDD
Monitors: 1x24" + 1x22" FHD 60Hz
OS: Windows 10 Pro 64-bit
My graphics card drivers are up to date (Adrenalin 23.5.2).

Once the game starts, I experience:

flickering screens
and after a while, permanent black screens (forcing me to restart the PC).
I have enabled RSR in Adrenalin as advised in guides I watched on YouTube to improve performance, but despite that, as I mentioned, the game refuses to run properly.

I have played with the same setup in the past, except for the graphics card, which was a GTX 1050Ti 4GB back then (this was more than 2 or 3 years ago, and apart from some FPS issues, the game worked fine).

Thank you in advance for any assistance or suggestions you can provide!