functions – Warning at top of website & top menu gone
call_user_func_array() is called by
add_action()) that was not declared properly. Scan the code for something like:
to find the culprit. If you do find it and it wasn’t something you added/changed, you will have to troubleshoot to determine why this function was not declared/found.
The top menu is still there – you can see it very faintly at the very top of the page as you mouse over the area just above the warning message.
One last thing – it looks like you have
display_errors enabled, which is not good practice for a public facing website.