I have a DNN site. Originally DNN 5.6 and Upgraded to DNN 7.4.2 version. Still, we need to be on DNN 7.4.2 and that's why.

This DNN site has so many child portals. About  50 and about 100+ domain names have pointed to this DNN child portals. The child portals are using English and Portuguese language too.

I exported some site templates of some child portals without any issues. But some child portals are not exporting it properly. It seems the export options has done half way only. A "site.template" file is there and the size is 0kb and no "site.template.resources" file at all. It is not giving any error messages and It is just stopping the loading icon and appear the window as it is and not giving the template path. 

This is what I can see on EventViwer and hope this is related to this issue. (Not sure though. But hope so.) Please, can you help me for this? Appreciate your supports.

AbsoluteURL:/Default.aspx

DefaultDataProvider:DotNetNuke.Data.SqlDataProvider, DotNetNuke

ExceptionGUID:bc3f21fe-ec57-48d6-b053-81aa650d0659

AssemblyVersion:

PortalId:-1

UserId:-1

TabId:-1

RawUrl:

Referrer:

UserAgent:

ExceptionHash:RcH7NcaPI5TxRNROOx5dQA==

Message:Unhandled Error:

StackTrace:

InnerMessage:Error: is currently unavailable.

InnerStackTrace:

   at DotNetNuke.Services.Exceptions.Exceptions.ProcessPageLoadException(Exception exc, String URL)
   at DotNetNuke.Framework.PageBase. (EventArgs e)
   at System.Web.UI.Page.HandleError(Exception e)
   at System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   at System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)
   at System.Web.UI.Page.ProcessRequest()
   at System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context)
   at System.Web.UI.Page.ProcessRequest(HttpContext context)
   at ASP.default_aspx.ProcessRequest(HttpContext context) in c:\Windows\Microsoft.NET\Framework\v4.0.30319\Temporary ASP.NET Files\root\29671b38\493ee164\App_Web_gwjicrxd.0.cs:line 0
   at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute()
   at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously)

Source:

FileName:

FileLineNumber:0

FileColumnNumber:0

Method:

Server Name: