Secrets + env variables in serverless functions

* https://cloudflare.vanishing-page.pages.dev/ * https://ea1e2f21.vanishing-page.pages.dev/ * account ID: 91f17a38dc4e8d98c2571e35ab3982f1 Hello. I need to set a secret environment variable and access it via a serverless function + pages site. On my local dev environment all is working correctly via a file .dev.vars. I have been setting the env variables + secrets via the Cloudinary GUI, but every time I access the function it is undefined. My feeling is that I am missing something simple. Is there anything else I can check? This is for a preview/branch deploy, if that matters. Thanks in advance for any help; this has been driving me crazy.