Disable all your custom addons and mods, if the issue is fixed you are now sure one of them is causing it.
Now, enable each mod, one at a time and test if the issue is back. If not add the next mod. As soon as the issue comes back see if its a combination of mods (by trying), a certain mod (by activating only the last one when the error starts to happen).
As you see, more than enough for you to do, good luck!
With that ammount of addons active you cant really expect not to run into troubles right. Troubleshooting than comes down to your own testing.
Also, what happened to "-mod="? And spaces in folder names?