"Invalid Lightspeed settings payload" error when saving Lightspeed settings

What this error means

When you save your Lightspeed settings (Settings › Integrations › Lightspeed) and one of the values isn't valid, BRM now tells you so directly — a message starting "Invalid Lightspeed settings payload: …" followed by the specific problem.

This is a recent change. Previously, an invalid Lightspeed settings save could fail with a generic server error that gave no indication of which field was wrong.

Why it happens

One of the saved fields doesn't match what Lightspeed expects — most commonly:

• An incorrect Account ID or Shop ID (see LSI006 — Lightspeed Account ID is missing for where to find the correct one)
• An invalid Tax Setup Type — this should be set to NONE, not SALES_TAX (see LSI010 — Invalid tax setup type)

How to fix it

1. Read the specific detail after "Invalid Lightspeed settings payload:" — it names the problem field.
2. Double-check that value against your Lightspeed account directly (Account ID/Shop ID come from Lightspeed, not BRM).
3. Correct it in BRM and save again.

Still stuck?

Contact support with the full error message — the text after "Invalid Lightspeed settings payload:" tells us exactly which field to check.