Description

Clicking the Create button in the EXM message creation dialogue does not create the appropriate message. The dialogue just hangs:

This issue affects EXM 3.0.0-3.4.2 versions.

Solution

1. In the /sitecore/shell/client/Applications/ECM/EmailCampaign.Client/Dialog/MessageCreationDialogBase.js file replace the following code:
   ...
   switch (createType) {
               case "ExistingTemplate":
                 this.createExistingTemplate(contextApp, eventInfo);
                 break;
               case "ExistingPage":
                 this.createExistingPage(contextApp, eventInfo);
                 break;
               case "ImportHtml":
                 this.createImportHtml(contextApp);
                 break;
               default:
   ...
   
   with this code:
   
   ...
   switch (createType.toLowerCase()) {
               case "existingtemplate":
                 this.createExistingTemplate(contextApp, eventInfo);
                 break;
               case "existingpage":
                 this.createExistingPage(contextApp, eventInfo);
                 break;
               case "importhtml":
                 this.createImportHtml(contextApp);
                 break;
               default:
   ...
   
   
2. Save your changes and clear your browser cache.