Lemon Squeezy API key is not configured

lemon-squeezy-api threw because the API key is empty before calling Lemon Squeezy.

Why this happens

Checkout toggle may be on without pasting the key. Sibling of broader “checkout is not configured/enabled” messages.

Diagnose and fix

1. Admin → Settings → Payment → Lemon Squeezy — paste API key; save.

2. Also set store ID and variant ID; enable checkout.

3. Use test mode keys only with test mode enabled.

4. See Lemon Squeezy Help article.

Related

• Lemon Squeezy checkout is not configured
• Lemon Squeezy checkout is not enabled — add API credentials, store ID, and variant ID
• Lemon Squeezy
• Common payment failures