First go to the BB_AIBlackBoard then click the New Key button and select Bool, Name the new Bool AllowRotate. Then press the New Key button again and select Bool and name the second new Bool BlockMove. If should look like the image below.

Next go to the BP_SmartAIComponent and create a new function called Set BB Allow Rotate and add a Bool input called AllowRotate then copy the image below.

Next create a second function called Set BB Block Move and add a Bool input called Stop Node then copy the image below.

Next add the highlighted node shown in the image below. Location at the top of the screenshot.

Next in the BP_SmartAIComponent create a new Bool variable called Melee Allow Rotation and set the default value to True (Ticked on) and tick on the Instance Editable option.

Next in the BP_AIHoldableMaster create a new Bool variable called Melee Allow Rotation and set the default value to True (Ticked on) and tick on the Instance Editable option.

Next save and close your project and download the folder linked below. Once downloaded unzip it then copy the content folder. Then go to your projects files it should look like the image below.

https://www.dropbox.com/s/m9kvh34rvev7qgt/Content.zip?dl=0

Once there paste in the content folder, you should see get a warning about replacing files click Replicate the files in destination.

Once thats done you can reopen your project and you are finished, to learn more about the new options you can read the short feature guide linked below.

https://defusestudios.com/new-melee-attack-settings/