KReport Dashboard :: TypeError: this.loadMask is null

Hello,

I am using KRport 4.2 and SuiteCRM Version 7.7.9.

I am getting js error “TypeError: this.loadMask is null” in https:///cache/include/javascript/sugar_grp1_jquery.js?v=N4zz6C5VXECsLvVFBcxamA%20line%202%20%3E%20eval

Please check attached screen shot.

Please any one help me.