problem with submit instructable to teacher section

Hello,
I have problem with submit my instructable at teacher section here:
https://www.instructables.com/id/Arduino-60/

My instructable were not in constest, so I dont know where is problem.
The errow which I see is: "Something went wrong"

I use for example this copy links

https://www.instructables.com/id/Measure-Size-of-Moon-With-Binoculars/
or this
www.instructables.com/id/Measure-Size-of-Moon-With-Binoculars/

with no success.
This is my instructable:
https://www.instructables.com/id/Measure-Size-of-Moon-With-Binoculars/

Thanks, MCH.