404 Error When Generating Automation Anywhere API Token

I tried generating an API token for the bot, but I’m getting a 404 error.

I used:

curl -X POST "https://xxxxx.my.automationanywhere.digital/v1/authentication" \
  -H "Content-Type: application/json" \
  -d '{
    "username": "xxxx",
    "password": "xxxx"
  }'

and I get:

Not Found

I also tried opening:

https://xxxx.my.automationanywhere.digital/v1

in the browser, and it returns:

{"code":"UM1117","details":null,"message":"Access token expected in the 'X-Authorization' header"}

But when I open:

https://xxxx.my.automationanywhere.digital/v1/authentication

I get a 404.
 

Am I using the wrong authentication endpoint, or is there something different I need to enable/configure for the API?