Hi @Jemayn , thank you for your answer. I'm working with section app. I have main template which hosts a custom control containing file drop zone component. So, my project has dropzone.css, dropzone.js, dropzone.html, uploader-controller.js and uploader-controller.html. The last one is mentioned in the manifest file, all *.js and *.css files are refered there too, but what to do with the dropzone control template?