Website blank after upgrading Virtue in version 3.4.1 or 3.4.2

[GJC Web Design]

Good .. no doubt fixed in the next release

[AnSit]

Yes, after correction editing worked correctly!
Very grateful to you, GJC Web Design, for the solution found!

[GJC Web Design]

BTW - this

JToolBarHelper is WRONG...   you have to find the instance of that and change to 'JToolbarHelper'

this is complete rubbish ..  lead up the garden path ( and terrible things done to me once we got there) by this:
https://github.com/joomla/joomla-cms/issues/14330

ignore .. the class is registered as  JToolBarHelper in VM and Joomla