MiamiDRGuy

– nothing wrong with WordPress core.

– Have you tried deactivating ALL (yes all) plugins temporarily to see if this resolves the problem (plugin functions can interfere). If this works, re-activate them individually (one-by-one) to find the problematic plugin(s).

– If that does not resolve the issue, With all plugins still deactivated, try switching to the unedited default Twenty Fifteen theme for a moment using the WP dashboard to rule out any theme-specific issue

I had done that, still nothing

When I done that, I find nothing then I decided to switch to 12-15 theme and created a new page and it still showing “?” on 1 line

is it something wrong with wordpress itself or plugins?