There is no error displayed.

@bloggerboy What error ~ Where ? You mean on the link to your site.

https://www.cybermidi.com/news/blog/

Like @northlight when I first visited I saw none but on a second access in taking a screen shot to show there was no error I got the following ??

The FATAL ERROR on the right side.

Did you read my post as i said when I first went there, like @northlight, it didn't occur on first access?

Will check again from another computer and router.

I still see it

Can you disable the widgets one by one in the side bar to see which one it may be?
And when did this happen? Did you update or change anything, maybe a server update to php etc.?

It was a search widget. I removed it.

One more, when I'm logged in I see at top of screen

" Container "Page Top"(page_top) cannot be manipulated because wrapper html tag has no class="evo_container".
Container "Header"(header) cannot be manipulated because wrapper html tag has no class="evo_container"."

Container "Menu"(menu) cannot be manipulated because wrapper html tag has no class="evo_container". Front Page(...)CategoriesArchivesLatest comments

Container "Header"(header) cannot be manipulated because wrapper html tag has no class="evo_container".

Container "Sidebar"(sidebar) cannot be manipulated because wrapper html tag has no class="evo_container

Regarding the search widget: Have you successfully re-installed it?

If you go to https://validator.w3.org/nu/?doc=https%3A%2F

%2Fwww.cybermidi.com%2Fnews%2Fblog%2F you will see a number of errors and note your HTML header the older HTML 4 and b2evo uses HTML 5

You may want to pay attention to the <div> errors that may have the effect of closing a tag in an inappropriate place so rendering the page 'wrong' this may bring up the errors you see.

So when was this working without errors/problems or is the first attempt to embed b2evo in your site?