Creating minimal project error. Create minimal project failure: cannot read template source.

[ADube.283]

This error is coming everytime when creating project

[Cartu38 OpenDev]

Maybe have a look at https://community.st.com/s/question/0D50X0000AmjFj1SQE/stm32cubeide-bugreport-1-unable-to-create-an-empty-project-with-stm32cubeide-2-build-job-gets-stuck-forever-trying-to-compile-stm32cube-project

Sounds like root issue maybe some space character usage within your IDE install path or end user name.