Search Indexing Error after Upgrade

Upgrading from 10.3 to 12   I have the search service running and can navigate to my solr instance (localhost:1212/solr)

I have upgraded connection strings in jobServer and web

Seeing this error for various content types and no content is getting in the index:

UnknownException: There was an error indexing content ('Custom Pages'). (
     There was an error indexing a piece of content.  Please contact a community administrator for further review.
    ) ---> System.Net.WebException: The remote server returned an error: (404) Not Found.
   at System.Net.HttpWebRequest.GetResponse()
   at Telligent.Evolution.Search.Solr.SolrWebRequests.GetFromHttpRequest(WebRequest request)
   at Telligent.Evolution.Search.Solr.SolrWebRequests.Post(String url, String stringToPost, String tracePointName)
   at Telligent.Evolution.Search.Providers.Solr.SearchProvider.IndexContent(IEnumerable`1 documents)
   at Telligent.Evolution.CoreServices.Search.Implementation.SearchIndexingService.IndexContent(String handlerName, IEnumerable`1 contentToIndex)
   at Telligent.Evolution.CoreServices.Search.Implementation.SearchIndexingService.IndexContentTypes(IEnumerable`1 registeredContentTypes, Int32 maxDocsPerHandler, CancellationToken cancellationToken)
   --- End of inner exception stack trace ---
   at Telligent.Evolution.CoreServices.Search.Implementation.SearchIndexingService.IndexContentTypes(IEnumerable`1 registeredContentTypes, Int32 maxDocsPerHandler, CancellationToken cancellationToken)
   at Telligent.Evolution.CoreServices.Search.Implementation.SearchIndexingService.IndexContent(Int32 maxDocsPerHandler, Boolean deleteQueuedContentEachRun, CancellationToken cancellationToken)
   at Telligent.Evolution.Api.Search.SearchIndexJob.Execute(JobData jobData)
   at Telligent.Evolution.Components.Jobs.EvolutionJobRunner.SubExecute(JobExecutionContext context)
   at Telligent.Evolution.Components.Jobs.BaseJobRunner.Execute(JobExecutionContext job)
   at Telligent.Jobs.JobConsumer.<>c__DisplayClass20_0.<Consume>b__0()
   at System.Threading.Tasks.Task.InnerInvoke()
   at System.Threading.Tasks.Task.Execute()
   at System.Threading.Tasks.Task.ExecutionContextCallback(Object obj)
   at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
   at System.Threading.Tasks.Task.ExecuteWithThreadLocal(Task& currentTaskSlot)
   at System.Threading.Tasks.Task.ExecuteEntry(Boolean bPreventDoubleExecution)
   at System.Threading.Tasks.Task.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
   at System.Threading.ThreadPoolWorkQueue.Dispatch()
   at System.Threading._ThreadPoolWaitCallback.PerformWaitCallback()