I have an issue where my EB environment tells me that it is using a "Deprecated platform branch". However when I try to update, the dropdown box for the platform branch is greyed out:
Question: How am I able to update the platform branch and why is it greyed out?
This means you'll have to create a new environment. Each branch corresponds to a specific version of node. You can't change the branch of an environment. As this branch is deprecated, you'll have to choose another branch during the creation of your new environment.