After upgrading to EPiServer v 10.+ and Epi Find to 12.3.2.0, the following error is found in the log, multiple times per minute:
2017-03-06 16:30:27,779 [129] ERROR EPiServer.Find.Cms.ContentEventIndexer: An exception occurred while indexing (IContent). Error getting value from 'AttributesString' on 'Castle.Proxies.TextareaElementBlockProxy'..
Newtonsoft.Json.JsonSerializationException: Error getting value from 'AttributesString' on 'Castle.Proxies.TextareaElementBlockProxy'. ---> System.ArgumentNullException: Value cannot be null.
Parameter name: httpContext
at System.Web.HttpContextWrapper..ctor(HttpContext httpContext)
at EPiServer.Forms.Implementation.Elements.BaseClasses.DataElementBlockBase.GetAutofillValues()
at EPiServer.Forms.Implementation.Elements.BaseClasses.InputElementBlockBase.GetAttributes()
at EPiServer.Forms.Core.BlockBase.get_AttributesString()
at GetAttributesString(Object )
....
The website and Epi Find search although is working as expecting. What could be the cause of this error?