Form submission fails from yiisoft/yii2 v. 2.0.50

[willworldeducation]

Submission of ActiveForm fails from update 2.0.50 of yiisoft/yii2 with error:

Uncaught TypeError: Cannot read properties of null (reading 'inputmask')
at new FormData (:23:38)
at pjax.handleSubmit [as submit] (jquery.pjax.js?v=1740441292:154:21)
at HTMLFormElement. (:44:161)
at HTMLDocument.dispatch (jquery.js?v=1740441289:5145:27)
at jQuery.event.add.elemData.handle (jquery.js?v=1740441289:4949:28)
at Object.trigger (jquery.js?v=1740441289:8629:12)
at HTMLFormElement. (jquery.js?v=1740441289:8707:17)
at jQuery.each (jquery.js?v=1740441289:383:19)
at jQuery.each (jquery.js?v=1740441289:205:17)
at jQuery.trigger (jquery.js?v=1740441289:8706:15)

It works fine with previous versions.