I added the large_icon
as fallback. The new priority is: first post image > opengraph_image > twitter_summary_large_image_url > site_large_icon_url > site_apple_touch_icon_url > site_logo_url
.
https://github.com/discourse/discourse/commit/ec7f418a22188bcdf7749c8bb75d8d3ddc2927b0
This also removes the warning that has been flooding the logs.
SiteSetting.logo_url
has been deprecated and will be removed in the 2.4 Release. Please useSiteSetting.logo
instead