When I try to edit the pages of the child theme, I get the error the_content.php, in the parent theme “ona” the error does not appear. Is there a solution?

I have created a template that is supposed to have a different color text that my normal posts. However, even though it shows the correct color in the style sheet for that template, the text is coming up with my default post colors. The background is correct, but nowhere in the templates is changing the text working. I have to do it on each individual post block for it to work (which is one reason i wanted the template in the first place). I am not very familiar with CSS but am willing to try if that’s the only way. It just seems like something is glitching.

HI I would like the default settings for my headings to be centred with a top margin of 0, can you please help me do this?

Thank you

I keep getting this message in page speed insights. “Ensure text remains visible during webfont load”. I tried enabling the swap setting in my caching plugin but it did not help. Is it possible to add this somewhere?

I think the theme creates image files for 1170 x 0 and 300 x 150, but I don’t use these sizes. Where can I change this setting?
Thanks.