Error Message The error message on Blogger looks as such: My Case In my case, that was from a link (stylesheet) href value provided by Google Fonts. By default, they put the &display=swap parameter to the URL . On regular HTML page, that should be fine. But on Blogger, it is unacceptable. Ah, let's use this font. Splendid. Please save the template, Blogger. (Hits save button.) Oi! Yes? The reference to entity "display" must end with the ';' delimiter. What does that mean? The reference to entity "display" must end with the ';' delimiter. (Removes the value after "display". Places ';' after "display". Hits save button.) Oi! Yes? The reference to entity "display" must end with the ';' delimiter. My Solution So the solution for this particular case is simply omit the &display=swap : That is all, I believe. Cheers. 🍺
Reflections on ECMAScript (JavaScript), CSS, HTML, technical fixes, music, cinema, entertainment in general, the English language, mathematics, history, and various curiosities of the realm.