Here is the link to my Blend file.
Picture: 
It’s nothing special but I cant figure out why I get problems rigging this mesh. It would be important and a great Help! Thanks for reading and I know there are a lot of guides answering this question but I tried all and it doesn’t seem to work.
I found that my vertices were too close together once I used the relax option twice from the W menu, right click bottom option in 2.82a, my rig and model paired perfectly, only a little tweak on the head and jaw bone.