Can't insert attachment to Kunena forum

What is "UI interface"? Is it different from the regular forum interface? (As with Tapatalk it works)

Also, if you can give me a hint for fixing the buttons on the bottom.

Thanks for your patience.

"UI interface" or User Interface is what you see when you click Reply or New Topic button in Kunena (buttons and other elements).

Button for attachments should open folders on your computer, then you select a file or image. It will be uploaded. Then you click Insert button wherever you want to insert the link of the file or image in your post.

If you have any problems related to Kunena component, please consult their forum here www.kunena.org/forum/index

Thanks