Hide Secondary Categories

Hello

i looked at it , yes indeed the code will show a locked empty selector
it is not a bug , it was done deliberately to show that user cannot have access to it

the term "hide" in parameter is misleading
will revise it and examine if this behaviour should be changed
now you can use CSS to hide it

note regardless of CSS to hide the selector,
the ACL is still needed, because if you did not use ACL and you just hide it, then someone can manually add it into the form and submit the form