Not able to add variables in multiple assign & click the build datatable button

I have been using 2019.4.4 Enterprise license with .NET framework 4.7 to build my robot previously. After reformatting my laptop,upgrading the .NET framework version to 4.8 and upgrading to Uipath enterpised 2019.10.2 , I realised I am not able to click the build datatable button and not able to add variables to multiple assign as shown in the image.

Hi
welcome to uipath community
Go to design tab -> manage packages -> in Project Dependencies set the package version of all activity package as you had in 19.4.4 version
or
kindly uninstall and re-install the uipath application and try once

Cheers @bychance

Hi Palaniyappan,

Thanks for your reply. However, the suggested methods do not work. I was thinking if the above issues was due to the primary reason shown in this image.This pop up shows in my windows when I was trying to identify an element via ‘TypeInto’ activity. Please advise.

Uipath-OutOfMemory