Cannot set properties of null(setting 'stylel')

TypeError: Cannot set properties of null (setting \'style\')

at Function,success (https://lib/wAGame.j3:1:964585)

at object.success (https://lib/wAGame.is:1:196149)

at n(https://lib/waGame.js:1:460090)

at https://lib/waGame.js:1:460268

at ne (https://lib/waGame.js:1:460306)

at https://lib/waGame.js:1:461079

at r (https://lib/wAGame.j3:1:454444)

at s (https://lib/wAGame.js:1:111227)

at r.callAndRemove (https://lib/waGame.js:1:101367)