I'm pretty sure that my problem is extremely rare. But there is a little bit hope that somebody has a solution.
I uploaded a Adapt-Course to a firm internal webspace. Visiting this course with Firefox works well. But I have problems with the Internet Explorer v11. Following error appears.
SCRIPT438: Object doesn't support property or method 'isArray'
I'm not a developer so I have absolutely no clue what happens here.
Thank you for any help. Unfortunately I can't give you access to the website. You find some screenshots attached.