Meetings SDK - getting error code 1 'Fail to join the meeting'

I am using meeting SDK for web (HTML, CSS and JS repo from GH)
I am using version 2.5.0

Details on your question, workflow or the problem you’re trying to solve.
I have a registration form that uses api to create token, which is working fine. I also have a page that integrates the meetings through the SDK. It was letting me join meetings fine yesterday. I haven’t changed the code. Today, I was doing further testing, I started getting this error:

I have double checked that role is getting passed along with a valid meeting id to the server that handles signature creation. I am also getting a signature back, which I can email to the Zoom staff if needed (I’ve seen this mentioned in other posts by Zoom staff).

Troubleshooting Routes
The troubleshooting attempt types you’ve already exhausted, including testing with the appropriate sample app (found on Zoom · GitHub).

Thanks in advance for any help you can give me.