Well, this tells us that the mod is not installed. You should be able to verify if it's installed by checking the mods folder for the files.

If the files are there, there has to be a folder and a file with the same name. The name of the fold and file will match the mod ID of this mod.

If all of that is OK and we can assume the rest of the files are present then the mod is not being added to your startup list correctly.

Now there can be an exception to this, and that would be when you have more than one mod being loaded before this mod and one of them are corrupted.

The best test is with a new game in single player and only this mod until you get it working

Turns out the issue was because of the mod Extra Spawns for Play as a Dino. It's discontinued so it was causing issues for other mods that i had installed too