Problem adding action group in page extension on page 20 (365 BC Spring 2019)

Hi all,

I'm having some issues with adding actions to my page extension on page 20.
By request from MS i have to either use addfirst or addlast, which both take an anchor name as parameter.
Theese are the existing actions on page 20


I wan't to add my actions in a new group last in actiongroup called <Action57> (Functions).
However the compiler in VS Code tells me that the action 'Action57' is not found in the target.
I have tried to include the < and >, with and without " around, but no luck

If i pass the value IncommingDocument into addlast it compiles just fine, but that is not where my actiongroup should be.

Does anyone have an idea how i can have my actiongroup added where i wish?
Is it because the Name property of the ActionGroup has not been defined by MS?
And if that is the case, why can i add fields to the repeater, also using addlast with the parameter of an "unnamed" control?

Any input are more than velcome. :-)

TIA

// Alexander