My wp site suddenly showed the default theme instead of its regular child-theme. Everyhing was restored when we put the parent theme name in the header of the style.css file. But the site was running correctly without that until that moment, our style.css didn't contain that syntax. Why did it happen? It can happen again so suddenly?? tnx
Child themes will not work correctly without the parent themes folder name being in the child themes
style.css file header as the
If this was missing, then someone must have removed it from the
style.css file and it would have been in there previously if the site was working before.