All,
     Im having a problem with my search on Sharepoint 2013.
I can crawl successfully on http but not https below are the erros im facing.
The first one below is critical as i have no idea what it means.
Thanks in Advance

https
The content processing pipeline failed to process the item. ( Cannot convert value 'System.Nullable`1[System.Guid][]' of type String to a value of type GuidSystem.Nullable`1[System.Guid][]; ; SearchID 

http://
The SharePoint item being crawled returned an error when attempting to download the item. 

sts4://
The SharePoint item being crawled returned an error when requesting data from the web service. 

https://
The object was not found

Checks

1. Farm Search Administration: is Ignore SSL Warnings set to Yes.
2. Has HTTPS been added to Alternate Access Mappings - preferably as Default.
3. Site Bindings: are there entries for both HTTP and HTTPS.  Both can exist, but HTTPS must exist.
4. Content Search Start Address: is the HTTP or HTTPS entered here.  Should be HTTPS.