I remixed the OpenStax Calculus book and successfully forked and edited many sections, but when I got to section 6.2:
https://math.libretexts.org/Bookshelves/Calculus/Book%3A_Calculus_(OpenStax)/06%3A_Applications_of_Integration/6.2%3A_Determining_Volumes_by_Slicing
(or 2.3 in my sandbox version:
https://math.libretexts.org/Sandboxes/drlarrygreen_at_gmail.com/Interactive_Calculus_Q2/02%3A_Applications_of_Integration/2.03%3A_Determining_Volumes_by_Slicing
)
it gives me the following error after clicking in the Fork icon:
"Cannot read property '0' of null"
Any ideas what might be the issue?
Thanks,
Larry