Uncaught TypeError: Cannot use 'in' operator to search for 'value' in null

[pratham-majithia]

I'm using poshytip with jquery to use the in-place editor.
My link code is as follows :

Enter header note

in my js file I've added the following:

$("#header_note").editable();

However when I click on the link this error shows up:

I'm using bootstrap 4.3.1

Please help with this issue. Thanks.