Broken Menu Functions
Something hosed the menu function. It destroyed the existing menus I had already built and won't let me add new menus at all.
I hadn't updated to new 5.1 yet when the menus stopped working. I updated versions of everything after that, but it still didn't fix the problem.
Comments
Please always attach a link so we can check it out. If the page is offline(localhost) then our help will be limited, you will have to contact us when the page is online. Also please make sure that the page is not under maintenance before you provide us the link.
It is always a good idea to also attach a screenshot, for that use services like snag.gy or pasteboard.co
thanks
Please send us WordPress dashboard access privately thru the contact form which is on the right side at http://themeforest.net/user/muffingroup#contact and we will check what might be the reason.
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We were on your website, and this problem is not theme related.
On the theme named "Twenty Nineteen" the problem persist, we also reinstalled WordPress, and it does not give any effect.
You should contact your hosting provider, he should take a look at logs and recognize the problem.
Thanks