Around a year ago I played a 1.7.10 version of the copious dogs mod, it was fine, everything worked, no issues. Now a year later, I try and start it up again and place the exact same file in the mods folder and the game keeps crashing and gives this message:
The game crashed: initializing game Error: java.lang.NullPointerException: Initializing game
It also gives the code -1.
I don't know what happened and what I can do about it, it is the only mod in the folder so it can't be clashing with other ones and it worked fine before. Just for sure I tried deleting and redownloading Minecraft, but that didn't help. I went looking for the mod and downloaded it fresh and tried again. No changes. So if anyone has any ideas, I'd be grateful.