Thanks for getting back to me. I’ll contact my bosses and get their feedback on doing an upgrade. Ideally I would prefer to do so, but we provide educational resources for schools and, since they’ve only just started back, there might be some reluctance to do anything which might take resources offline.
If anyone has any ideas on what could fix this in the mean time I would appreciate it (I’m going to push the upgrade anyway though since the security issues will be a problem)
Thanks for the help, but that doesn’t seem to work for me. If I remove the number from the add_menu_page function as you’ve got in that first code segment the entire menu disappears rather than just the sub-menu which duplicates the top-level menu. Keeping the number and using the same second lines you wrote don’t seem to work either.
EDIT: I don’t know if this’ll make any difference, but It’s probably worth mentioning that I’m running this on XAMPP just in case this is what’s causing the problem