Hi,
Try reindexing your site. This error is most likely due to the fact that a contentype has been deleted/removed from the code but an instance is still in the index and when trying to resolve it you get tis error. After you have reindexed your site there should not be any unknown items in the index and you should not get this error.
/Henrik
I had to clear the index on the service page at find.episerver.com, just to start the scheduled job manually to reindex it didn't help.
Anyway the error message for that could get updated to show what id in the index that is causing the issue?
Will be running a index with 5 miljon douments soon and would be nice to just be able to delete the specific item instead of clearing the hole index.
I have added a bug so that it will provide a better error message for this.
When I browse to site/secret/Find/IndexOverview/Explore I get the following Stack Trace: