So, I'm having an issue with starting up the game
IDK what it means or how to fix it
It's saying "RPGVXAce RTP is required to run this game"
Viewing post in Caliross, The Shapeshifter's Legacy comments
Here it is:
https://s3.amazonaws.com/degica-downloads/RPGVXAce_RTP.zip
The game uses the RTP (which is the basic set of RPG Maker assets), and you need to install it separately. Basically, it makes future downloads smaller, since part of the assets are already on your PC (and if any other game does the same, you also have smaller download and installation size for those).