Hi @stavares5 , as @PamCotton mentioned, to get access to CRM developer tools, you need to be a super admin and have access to either a portal that has Sales or Service hub enterprise or a partner demo account. If these are all set, then you can enrol in the beta, using Product updates > Betas section.
A couple of questions to know why you get this message
1. What actions prompted this message?
2. What type of changes did you make in your project?
if you have a Sales or Service hub enterprise and are using App Functions, you won't see this message. However, if you are using endpoint functions, in that case, you need to have CMS hub enterprise too.