When i go into work packages and i want to add the progress % to my custom view.

When i click to save this view i get an internal error.

I walked through this trouble in the attached files 5,6,7,8,9,10, and 11.  

We are currently using 

openproject.x86_64

8.2.1-1550429392.328d0cc4.centos7

@openproject-ce

Attached is production.log for when this error happened.

Is there anyone out there that works on OpenProject that can answer this or point me in the direction of getting a resolution to this.