Entity Node not working

Hello together,

I installed Node-RED within the Hass.io installation via the add-on Store, which ran without any problems.
But when configuring an Entity Node I get the following message although the custom integration is installed.
Attention: This node requires Node-RED custom integration to be installed in Home Assistant for it to function.

In the logfile of Node-RED I get the following error message:
9 Dec 19:10:58 - [error] [ha-entity:test01] Node-RED custom integration needs to be installed in Home Assistant for this node to function correctly.

Can you please help me, maybe I have an error in the configuration.

The configuration of the entity node looks like:

node-red-contrib-home-assistant-websocket is also installed.

thanks and best regards

how did you solve this?