Failed to upgrade discourse instance to Feb 15 2022

[balupton (Benjamin Lupton)]

Will try that, how do I apply it?

Nevermind, found it:

New installs will default to Ember CLI builds in Production

As of today, all new self hosted installs of Discourse will default to using our Ember CLI builds in production. We’ve been running these builds ourselves in production for quite some time now and they should be stable and work with all major plugins. If you encounter any issues and need to turn it off, edit your app.yml and remove EMBER_CLI_PROD_ASSETS: 1 Otherwise, please report any bugs to us and we’ll be quick to fix them. In the near future all installs of Discourse will be using the Emb…

Will give it a go now.