first , thank you for the quick reply.
I imported it like you did
e.g
import { Graph, InternalEvent,PopupMenuHandler,CellRenderer,CellEditorHandler , HandleConfig, TooltipHandler, SelectionCellsHandler, ConnectionHandler, SelectionHandler, PanningHandler, RubberBandHandler} from '@maxgraph/core';

i get the Error above

Additional hint: After a search for all files containing HandleConfig I did not find any file in node_modules.

Hi @thomasstuempfig, I guess you are using maxGraph 0.13.1.
The stories in the main branch are using the code of maxGraph from the main branch as well, so they can relied on unreleased code.

HandleConfig is available as of version 0.14.0 which is not released yet. It doesn't relate to PopupMenu so I suggest you not to import it in your code.
You can also have a look at https://maxgraph.github.io/maxGraph/demo/?path=/story/misc-showregion--default
The code of the stories is available at https://github.com/maxGraph/maxGraph/blob/main/packages/html/stories/ShowRegion.stories.ts

Hi @tbouffard
Thank you for the hint. I will check it out.
regards
Thomas