Wrong error message in scheduler

I trued to schedule an instagram post with 6 images and the system tell me it can't schedule videos. They aren't videos, they are jpegs images in a square format. Consequently I cannot schedule my post. Thank you! *the images have been created with Photoshop.

I also cannot re-order the slides while I can swear I could do it before (beta version or later)

It also says "beta" although there shouldn't be a Beta version anymore...