I was using a jquery-ui-datepicker in the plug-in made.
So, if you remove it, the problem has been resolved.
Perhaps it seems that conflicts between javascript.
I want you to look to find the cause one by one remove the javascript.
I found the cause.
wp_enqueue_script ( ‘jquery-ui-datepicker’);
That function was being used globally, was the problem solved after deleting that sentence.
Many are included script using the ‘jquery-ui-datepicker’, I do not know exactly whether any part of this problem.
I get the same error occurs in WP 4.6.1.
Chrome, IE11, FF is the same.
I hope to be soon resolved.
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This reply was modified 9 years, 8 months ago by imjusti.