Support for the experimental syntax 'decorators-legacy' isn't currently enabled (4:5)

[Bexy-Lyn]

Hey there,
I have tried to include MobX and Typescript in my app using your example and I ran into an issue with the decorators in Typescript. I do not understand how the experimental syntax is not enabled, when the tsconfig.json does exactly that, as I understand it... Researching the issue I found forum posts that suggested the use and configuration of a ".babelrc.json". However, if I add it, I get the error message "Generating SSR bundle failed". Does anyone have an idea what I forgot?

I am thankful for any help!