20200702_ERROR: configuration of piston triangle is not allowed.

Problem

1.0.0.121
2019.2.9f1
HI followed tutorial given in below link and trying to learn piston joint.After following all the steps when i configuring piston joints triangle i am getting error  " ERROR: configuration of piston triangle is not  allowed."

can you help me out of this error.

I am not able to open  following support website also.
"https://unit040.atlassian.net/wiki/spaces/PUD/pages/6979785/V2020.1.56.3_+Feature+Overview "
High

https://unit040.atlassian.net/browse/PPRP-260

Solution