The previous issue was due to 3rd extension with a new route.
- Add Blog Post journal3/blog/post to Page settings.
- also Blog Feed journal3/blog/feed
But your case is slightly different, I do see x-opencart-lightning instead of litespeed cache header. If x-opencart-lightning is a full page cache plugin, then LSCache will not working properly. Please try turning off the opencart lightning see if it helps.