I'm using Vaddin 14 + Spring Boot + card 2.0.0.beta3 and wanted to create a

I’m using Vaddin 14 + Spring Boot + card 2.0.0.beta3 and wanted to create a card, but got this Exception:
Couldn’t find the definition of the element with tag ‘content-card’ in any template file declared using ‘@JsModule’ annotations. Check the availability of the template files in your WAR file or provide alternative implementation of the method getTemplateContent() which should return an element representing the content of the template file.

Are there other dependencies necessary?

I think you are just missing the prepare-frontend goal of the vaadin plugin.

I have the same issue, did you fix it?

I am using vaadin 14+spring boot 2.1.8+card 2.0.0.beta4 in compatibilityMode and getting same error. I am also running prepare-frontend and build-frontend, but still getting same error. Were anybody able to solve this?

As stated below the release notes the compatibilityMode is not supported in any 2.0.*, only npm.
For compatibilityMode downgrade to 0.9.4.

Thank you.