Email Stuck in Progress

Hello, I’m experiencing an issue with Uncanny Automator when integrated with SureCart.

Scenario:

• I’m using the SureCart purchase trigger (PURCHASE_PRODUCT).
• When I use a webhook action, the recipe runs successfully and completes as completed.
• However, when I use an email action, the recipe gets stuck in in-progress.
• The log does not properly display the actions and returns a generic error.

Debug error:

Error creating throttler: Invalid settings

Tests already performed:

• Created recipes from scratch (no duplication or import)
• Tested with a fixed email (no tokens)
• Tested a simple recipe (user login + email), which works fine
• Verified throttle settings (all set to “Unlimited”)
• WP-Cron is working
• No issues in Site Health
• debug.log does not show any errors
• Webhook with the same trigger works perfectly

Observed behavior:

• The SureCart trigger fires correctly
• The execution starts but does not complete when using email actions
• The error indicates a failure when creating the throttler, even with valid settings

Suspected cause:

• Possible bug in the throttling mechanism
• Or an issue with the internal queue system
• Or incompatibility with SureCart’s REST-based checkout flow

Question:
How can I fix the “Error creating throttler: Invalid settings” in this scenario, considering that:

• throttle is set to Unlimited
• the recipe was recreated from scratch
• other actions (like webhook) work normally
• only certain actions (like sending email) get stuck in “in-progress”?

Thank you.