After going through addons and disabling them, and etc, I have found some possible fixes. The creator of this addon (EP45) made a video a while ago, and in short it meant addons conflicting cause the problem, so if this doesn't work then just note that you could have a addon that is also not compatible*. Nonetheless I still want to post this just in case it works for everyone. To fix just disable/uninstall the addon(s) and it will fix. Hope this helps people who like this addon. 👍

Conflicting Addons:
" Thanos's Infinity Gauntlet SWEP and Model "
" TFA Base " Possibly
" Bullet Time "


*Note: Other addons may also conflict with this SWEP.
P.S. I may update this discussion if I find other conflicting addons.