Needs Answer
It's ok when viewed as an activity. But when I try to open it to edit, it's just blank.
https://www.geogebra.org/m/e5jbrqv2
A small message appeared saying no file chosen.
Also a number of privates files that I have deleted kept appearing on my resource page. I can't seem to delete them.
The same question 
I have addressed your issue to the Support Team
Does it work if you try the same steps in the new CAS App?
http://www.geogebra.org/cas/
No it doesn't. It's still open with a blank.
If I were to redo in the new CAS it works.
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