Expanded Mermaids Mod Issue

So I’ve been trying to install the Expanded Mermaids mod by SpinningPlumbobs for my partner (and will be trying for myself when I’m home in about a week) though it persistently is giving an error through the MC Command Center mod and the mod doesn’t work at all if you continue to play the game normally. There is also an error from the Better Exceptions mod (another error detection mod) that seems to target a specific file(?) from the Expanded Mermaids mod but I’m unsure what it is or what it does.

Recent comments would suggest no one else is having this issue and I’ve tried to follow the installation instructions as closely as possible so I have no idea what the problem is. SpinningPlumbobs Plantsims mod works perfectly fine and carries a similar format to the mermaids mod. 

Any modders or troubleshooters have any ideas on how to solve this issue? I’ve already went through the mods and determined it is in fact solely the Expanded Mermaids mod that is causing problems.