Irreparable Motor6D Bug

So I just finished, rigging my new character and the right and left arms are both rigged the same except the left arm seems to be locked in place, I have this problem in the past with other rigs and was never able to get past it. Any ideas? All properties are default.

https://gyazo.com/3b954f9a4741abd4f60d702f5e4aaf2d

You don’t need to create a new topic to change the category, and it was fine in Building Support anyway.

The original post for those that can help.

Please refer to Irreparable Motor6D bug