Unable to insert a token by click into a BPMN field

Problem/Motivation

I've installed the Token module and tried to add a token into a log message field in the BPMN sidebar. The adding by clicking a token in the token browser lead to the following alter panel:

Steps to reproduce

- composer required eca@dev, bpmn_io@dev and token
- installed eca core, eca content, bpmn.io for eca, eca bpmn, eca log, eca user and the token module.
- created a model
- startevent: login of a user
- action: log message -> channel user, severity notice
- open the token browser
- scroll to the user section
- then click the empty message field in the bpmn sidebar.
- then click a user token in the token browser
=> then the alert panel shown in the screenshot shows up.