Date field returning TypeError when loaded

Hi there! I just created a date field for my doctype and when a document in that doctype is loaded, console shows this error:

Uncaught TypeError: Cannot read property ‘en’ of undefined at m._defineLocale (control.min.js:4)
at m.update (control.min.js:4)
at SubClass.update_datepicker_position (control.min.js:1125)
at onShow (control.min.js:1086)
at m._bindVisionEvents (control.min.js:4)
at (control.min.js:4)
at m._onShowEvent (control.min.js:4)
at HTMLInputElement.dispatch (jquery.min.js:3)
at HTMLInputElement.r.handle (jquery.min.js:3)

Hoewever, this did not affect it’s working. But, I am worried it might be some bug that might create problems later. I do not understand what’s wrong. I did some digging in the source files but I’m a beginner in javascript, so, I decided to seek help from the forum. Please help me solve this error. Thanks!