Does the app need any special plan pricing?
To use Zapier with Squarespace, you must be on the Website Business plan or higher. To learn more, visit their Premium features page.
The form on my cover page isn't showing up!
Zapier can only receive data from Form Blocks in Squarespace. Forms created as part of a Cover Page are not yet supported.
As a workaround, you can configure your Cover Page form in Squarespace to use Google Drive or an email address as its storage. You can then trigger your Zap using the Google Sheets or Email Parser integrations.
If your form is within a Form Block and doesn't appear in the dropdown, delete and recreate it within your Squarespace site. It should then appear when you refresh the Zap's dropdown menu.
I can't turn on my Zap, even though it tested successfully
Squarespace only allows for one live Zap to be associated with a form, so if you have an existing Zap turned on that's connected to your form, you'll need to turn it off before turning on another.