On our X-Carve 1000mm, the spindle needs to be manually turned on and off. If your machine has an automatic spindle control, it needs to be enabled.
You can enable this setting by setting up your machine properly. Go to Machine > Set up new machine and select Other (3rd Party Machine).
Follow the prompts in the walkthrough and during the "Spindle Settings" step, select Automatic.
Easel will prompt you to test the spindle to make sure it works.
Continue to the Machine Setup until you finish. You should now be configured for the spindle to turn on before a carve.
If it still does not work, you can go to Machine > General Settings and change the Spindle control to Automatic.
If this does not resolve the issue, it may be a hardware failure. For hardware issues on a non-Inventables machine, you will need to reach out to your manufacturer for additional support.