Although it will depend on what you want to do with the extracted content as html, but you can get the content as xml files by packaging up from the package manager or by pulling them into your projects content folder using some IDE plugin and then convert the extracted xml files to html.

No, the concept of allowProxy was not there in 6.1 as clientlibs were directly kept in etc always. So there was no need of it (allowProxy is used to proxy the clientlib put in apps via etc.clientlibs)  

Debug the code inside TextModel class. It must be getting stuck somewhere due to some error, might be some unexpected value which is being injected and the code is failing to handle that.

I have used the below code to detect a dialog load event for previous versions of AEM (I think AEM 6.3). Currently I am using AEMaaCS and when I use the same, I notice that the control is never going inside the below code:$(document).on("foundation-contentloaded", function (e) {});Please share if th...

I encountered the same problem once and was getting the exact same error as you mentioned. Solution: Started command prompt with admin rights and ran the same command. It did work.