What is the "Server Sending Invalid Match Key Parameters" alert?
Server Sending Invalid Match Key Parameters indicates a problem with matching parameters in server data. Read the precise field and diagnostic details; an ad blocker is not an established single cause, and all alerts should not be ignored.
- Identify the event, affected field and time in Meta.
- Check the source value, its format and the normalization performed by your module version.
- In Facebook Pixel → Pixel code, the option whose label refers to cookie-blocker warnings reduces some location fields sent. Enabling it is not a universal fix for invalid data.
- Repeat a server test and inspect reception and diagnostics. See CAPI testing.
The illustrations below show examples and navigation landmarks. Names, dates and layouts may differ in your installation; follow the checks described in the text.
