graphical glitch

My machine: HP Laptop Model 17-by3065st Intel Core i5 10th Gen Windows 10 After installing today's Portugal Pack and starting a new game, I began experiencing a recurrent graphical glitch, consisting of a tannish-colored flash obscuring the Civics menu for less than a second, almost as if the...

I finally bought the game, having been waiting years for some DLC and a good sale before I made the purchase. I went to launch it and after about 5 minutes at the loading screen, I finally got the cinematic. Slow loading, but going fine so far. However once the cinematic stops playing it gives...

So, does anyone have any ideas about what could be causing this odd graphical glitch? I have also observed that city center and district upgrade buildings do not appear properly. Not a deal breaker but very annoying when located at the center of the map. Tried disabling mods one at a time to...