Empty error messages when hovering over BPMN validation issues

[Tupiet]

Describe the Bug

TL;DR: While the modeler is showing that there are some errors in a BPMN, it doesn't show the text of the errors when hovering.

I'm using the modeler layout from bpmn-js-examples, which allows me to see and create BPMN files. Then, I've added bpmn-js-bpmnlint, because I need to see the errors that are in the diagram. I've followed the steps from the bpmn-js-bpmnlint, and the result is that, while it shows the correct number of errors, when I hover the error, the message is empty.

Steps to Reproduce

1. Clone the modeler folder from bpmn-js-examples
2. Add bpmn-js-bpmnlint following the steps from the bpmn-js-bpmnlint page
3. Add the bpmnlint-loader
4. Add the .bpmnlintrc
5. npm install
6. npm run dev
7. Open a BPMN file
8. Enable the BPMN validation (click the "pill" at the bottom-center)
9. Hover the errors
10. See nothing in the error message

I've created a repro, if this helps: bpmn-editor.

In the repro, I've commented with an asterisk (*) the lines in src/app.js and webpack.config.js I've added that were not in the modeler base, the lines I've added to add bpmnlint.

With the repro, the steps are the following ones:

1. git clone https://github.com/Tupiet/bpmn-editor.git
2. cd bpmn-editor
3. npm install
4. npm run dev
5. Open a BPMN file
6. Enable the BPMN validation (click the "pill" at the bottom-center)
7. Hover the errors
8. See nothing in the error message

Expected Behavior

I would expect to see the text of the errors.

Environment

• Browser: [Safari 17.3, Chrome 121.0.x.x]
• Library version:
  • bpmn-js: 17.0.2
  • bpmn-js-bpmnlint: 0.22.2

Finally, thanks for this amazing library! Feel free to ask me for more details if you need it.

[Tupiet]

If this helps, I've just discovered that warnings are shown, only errors aren't.

[nikku]

Thanks for opening this bug. I can reproduce it with your setup and transferred this issue to bpmn-io/bpmn-js-bpmnlint.

[barmac]

Notice however that if you run npm start in this repo, both error and warning tooltips display correctly. So it might be something about the user's setup.

[nikku]

@barmac I was about to comment exactly that. We'd still need to investigate what is up, as this affects a simple modification of the existing modeler example.

[Tupiet]

Firstly, thank you for taking the time to review this. Strangely enough, in my case, doing npm start gives me the same result as npm run dev: error tooltips don't display correctly, while warnings do.

[barmac]

What browser do you use?

[Tupiet]

Tried both Safari and Chrome, same result.