@jayemel - We just tested 6.4.10 on our Dev site, and SimpleSAML is working for us. It was not working with 6.4.8 or 6.4.9....we've been using the conflict block suggested by @berdir, which allowed us to push a few module security updates last week. Thanks for that suggestion @berdir.
We're going to do some more testing of 6.4.10 on our staging server, but we are cautiously optimistic as well.
I'm marking this as fixed. For anyone running into this, we were able to resolve by updating our config yaml files - drush cex - and importing them on our drupal10 branch.
We had to update two of our config files - views.view.content.yml and views.view.content_search_api.yml .
Both needed this block added:
third_party_settings:
config_selector:
feature: thunder_content_view
priority: 0After adding this and running drush cim, this error went away.
Thanks for you help daniel.bosen!