Apps will not load properly

Here's the deal...I have fully configured apps in 3 2013 environments up to this point and this time around I cannot get apps to load properly.  I get the error below in the server application log.  In short it is an Internal Server 500 error and these are the relevant lines (I think):

Exception type: UriFormatException 
Exception message: Invalid URI: The hostname could not be parsed.

My setup is as follows (as it has been in the last 3 environments I have built where apps is working):

1 x SharePoint 2013 Web server

1 x SharePoint 2013 App Server

1 x SharePoint DB Server (SQL 2012 R2)

I have configured Apps by creating the App Management and Subscription service, and creating a new web application with no host header that is listening on 443.  I have a load balancer that is also listening on 443, which has the web server on port 443 as its only load balanced node.  DNS points all request to *.appdomain.com to the load balancer on 443 then to the back end web server on 443.  I have the app domain and app domain prefix set in SharePoint CA.  I can to a site collection and browse the SharePoint App Store, install it, but when I launch it it shows me the app, but only the text.  There are no images.  And each time I try to launch the app there is a corresponding event log ASP.NET 4.0.30319.0 error 1309 which indicates the following:

Event code: 3005 
Event message: An unhandled exception has occurred. 
Event time: 7/3/2014 3:52:29 PM 
Event time (UTC): 7/3/2014 7:52:29 PM 
Event ID: b2508f42438c49028d246d472a63096d 
Event sequence: 32 
Event occurrence: 22 
Event detail code: 0 
 
Application information: 
    Application domain: /LM/W3SVC/1624334000/ROOT-1-130488879715269082 
    Trust level: Full 
    Application Virtual Path: / 
    Application Path: C:\inetpub\wwwroot\wss\VirtualDirectories\appdomain.com443\ 
    Machine name: SP-DR-WEB01 
 
Process information: 
    Process ID: 5408 
    Process name: w3wp.exe 
    Account name: domain\sp_dr_app_pool 
 
Exception information: 
    Exception type: UriFormatException 
    Exception message: Invalid URI: The hostname could not be parsed.
   at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
   at Microsoft.SharePoint.SPSite.GetHostHeaderRelativeUrlFromLookupKey(String hostHeaderLookupKey)
   at Microsoft.SharePoint.SPSite.LookupSiteInfo(SPFarm farm, Boolean contextSite, Boolean swapSchemeForPathBasedSites, Uri& requestUri, Boolean& lookupRequiredContext, Guid& applicationId, Guid& contentDatabaseId, Guid& siteId, Guid& siteSubscriptionId, SPUrlZone& zone, String& serverRelativeUrl, Boolean& hostHeaderIsSiteName, Boolean& appWebRequest, String& appHostHeaderRedirectDomain, String& appSiteDomainPrefix, String& subscriptionName, String& appSiteDomainId, Uri& primaryUri)
   at Microsoft.SharePoint.SPSite..ctor(SPFarm farm, Uri requestUri, Boolean contextSite, Boolean swapSchemeForPathBasedSites, SPUserToken userToken)
   at Microsoft.SharePoint.SPSite..ctor(SPFarm farm, Uri requestUri, Boolean contextSite, Boolean swapSchemeForPathBasedSites)
   at Microsoft.SharePoint.Administration.SPAlternateUrl.GetContextUri(HttpContext ctx)
   at Microsoft.SharePoint.Publishing.CatalogUrlCache.GetFriendlyUrlCacheKeyFromContext()
   at Microsoft.SharePoint.Publishing.PublishingHttpModule.OverrideUsageAnalyticsData()
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

 
 
Request information: 
    Request URL: https://apps-a7a948ec2f773b.dr.appdomain.com:443/_layouts/15/init.js?rev=/WTxr8UesytJ8GB/5hOwZA== 
    Request path: /_layouts/15/init.js 
    User host address: 10.210.1.135 
    User:  
    Is authenticated: False 
    Authentication Type:  
    Thread account name: domain\sp_dr_app_pool 
 
Thread information: 
    Thread ID: 41 
    Thread account name: domain\sp_dr_app_pool 
    Is impersonating: False 
    Stack trace:    at System.Uri.CreateThis(String uri, Boolean dontEscape, UriKind uriKind)
   at Microsoft.SharePoint.SPSite.GetHostHeaderRelativeUrlFromLookupKey(String hostHeaderLookupKey)
   at Microsoft.SharePoint.SPSite.LookupSiteInfo(SPFarm farm, Boolean contextSite, Boolean swapSchemeForPathBasedSites, Uri& requestUri, Boolean& lookupRequiredContext, Guid& applicationId, Guid& contentDatabaseId, Guid& siteId, Guid& siteSubscriptionId, SPUrlZone& zone, String& serverRelativeUrl, Boolean& hostHeaderIsSiteName, Boolean& appWebRequest, String& appHostHeaderRedirectDomain, String& appSiteDomainPrefix, String& subscriptionName, String& appSiteDomainId, Uri& primaryUri)
   at Microsoft.SharePoint.SPSite..ctor(SPFarm farm, Uri requestUri, Boolean contextSite, Boolean swapSchemeForPathBasedSites, SPUserToken userToken)
   at Microsoft.SharePoint.SPSite..ctor(SPFarm farm, Uri requestUri, Boolean contextSite, Boolean swapSchemeForPathBasedSites)
   at Microsoft.SharePoint.Administration.SPAlternateUrl.GetContextUri(HttpContext ctx)
   at Microsoft.SharePoint.Publishing.CatalogUrlCache.GetFriendlyUrlCacheKeyFromContext()
   at Microsoft.SharePoint.Publishing.PublishingHttpModule.OverrideUsageAnalyticsData()
   at System.Web.HttpApplication.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)
 
 
Custom event details: 

Any help would be GREATLY appreciated.  

Thanks.