I downloaded and launched the game from the itch.io website myself, but I didn’t encounter any such issues.
I’d like to confirm a few things:
Are you running the game on Windows?
I’m sorry, but we do not support any operating systems other than Windows.
Did you download all the packages from the orange links on this page?
https://rpgmakerofficial.com/product/support/faq_actmv.html
Please download all the C++ packages from the orange links on this page.
If it still doesn’t work after checking the above, could you please share details about your system environment?