@radio-birikina – That would suggest your version of WP is very old, or that there is some type of corruption of your WP install. That function was added in WP 3.6, current is 4.4.2.
https://codex.wordpress.org/Function_Reference/wp_nav_menu_disabled_check
Alternatively there may be some other conflict causing those functions to not be loaded properly, but either way signals something isn’t working properly in your install.
I will also add that in v1.4 which I am working my butt off to get out as soon as I can, fingers crossed this week replaces the code that calls that function entirely so once that goes out that issue shouldn’t exist for you.
Thanks a lot for answer. I know WordPress is not updated but I inherit the website and who made it, he blocked the updates…
It’s not an easy situation
I will try to solve my problem in another way…
Thanks again
Claudio
@radio-birikina – I understand. As I said our latest version will not use those functions but will still likely require at least WP 3.4 or 3.5. I will have to check.
