Is it a wrong config of my theme or local environment ?
I precise I’m .running my local env via a Docker setup with DDEV on WSL2, I’m normally respecting all needed config (PHP version…etc…). I installed Acorn via the plugin in Wordpress backoffice.
I got this error once after merging branches and in my case checking out the repo in a fresh folder fixed it. So everything in the repo after the merge was good, but something in that local such as caches or other files must have been the cause.
I never found out what really caused it, but it sounds like your scenario is with a fresh instance of Sage. So I don’t know this will help.
Acorn as a plugin has had some issues too, might look through here for threads about that, but I don’t know about that specifically. I’ve only ever installed Acorn in Bedrock at the root of the projects.
@SpiZeak This topic is already solved — please create a new one with more information if you’re looking for support. Since you’re upgrading an existing project that already has changes to it, it would be best to show us a git repo that contains this issue for us to reproduce.