I upgraded from 1.29 to 1.30 on Drupal 10.1.5 and looks good to me
are you seeing this for Drupal 10.1.5? where do you see this error? Settings or when searching?
Thanks
it seems that loading="lazy" attributes is not added for responsive image field formatter (set for image field under Manage display) there is a patch for D9 as per this page https://www.drupal.org/project/drupal/issues/3192234 📌 Apply width and height attributes to allow responsive image tag use loading="lazy" Fixed and D10.1 now included fixed for this in the core ( https://www.drupal.org/node/3279032 → )
D9 with above adds loading attribute to image, or can be enable for all images via hook https://www.drupal.org/node/3173719 →
MR12 works for me when using with Seven administration theme, thanks