The errors in the picture state that the source of the problems is that it could not find the file "user://mods/AricsExpansion/scripts/aricsexpansion/expansion.gd". Given that it appears to have successfully modified the game files so that they will request the file, the issue appears to be acutely related to the "aricsexpansion" folder and it's contents.
My path to this file(Windows 7, no itch.io launcher) is "C:\Users\USERNAME\AppData\Roaming\Strive\mods\AricsExpansion\scripts\aricsexpansion", and it contains the files:
"expansion.gd", "expansionfarm.gd", "expansionraces.gd", "expansionsetup.gd", "expansiontalk.gd", "old - expansion.gd", "old - expansiontalk.gd"