So I applied a large series of updates bringing our test environment up from 7.5.x up to 7.15.3 and everything went great.

Well we have our production side which I applied the same series of updates but now the pictures aren't loading properly and when the communities tries to load it throws a ysod.

Here's where its crashing:

if (Model.Content.HasValue("communities"))
{
    var communityListValue = Model.Content.GetPropertyValue<string>("communities");
    var communityList = communityListValue.Split(new string[] { "," }, StringSplitOptions.RemoveEmptyEntries).Select(int.Parse);
    var communityCollection = Umbraco.TypedContent(communityList).Where(x => x != null);

now on the test side the value of communityListValue is - "2513,2515" On the non-working production side it's pulling - "System.Collections.Generic.List`1[Umbraco.Core.Models.IPublishedContent]"

I have a suspicion it's not indexing properly so I deleted the examine indexes(they had folders but were otherwise blank) and rebuilt them from the developer tab in back office and it did put files in there but they aren't the same as in the examine index in the test env. I don't know if they should be.

Any advice would be appreciated.