You can download the uber jar from Index of /repositories/releases/com/adobe/aem/uber-jar/6.5.0.0 Review doc How to Build AEM Projects using Apache Maven  in order to understand how to use this jar.

This post might help in achieving this feature: Adding .html extension to page selected

Afaik, the server-side sorting on any custom column is not supported by AEM yet. Regards,Vishu

Hey Farah,Also, check this similar post: https://forums.adobe.com/thread/2603702#10980636

Hey,You should always use the latest dispatcher version. Try with the dispatcher-iis-windows-x64-4.3.2.zip which was released in Jan, 2019. Download the latest version from AEM Dispatcher Release Notes Regards,Vishu

I think he has 5.6 repository with crx2 backend. He is using "-- -o migrate" in tne migrate command.

Maybe the ImageMagick is not set up properly. Do you see broken images while using on the pages or also in the asset details.(assetdetails.html/content/dam).Did you see any error in the logs while uploading the EPS/PDF assets to AEM?Regards,Vishu

Check out this post Getting error "Can't create child on a synthetic root" in 6.3  and try kautuksahni​'s suggestion.

Hello Everyone,The product team is currently working on this issue. The internal reference number is GRANITE-15894 and GRANITE-26358.This has been classified as an enhancement to the product.Regards,Vishu

I have seen this exception in a few other use cases like folder creation, user creation etc. Can you provide the complete error message?Is this happening only on Rollout process?