FB Pixel is not showing ATC or SALES

[ssagca]

Hello everyone,

I've already made sales, and had no troubles with my pixel, but suddenly when I begin my campaign and attempt to select the correct pixel, and pick ''Purchase'' as the Conversion Event, Facebook displays the following message in an orange pop-up:

''Your ad may not be optimized for conversions because we have not received activity from your pixel for more than 7 days.
Optimize for conversions:
View Pixel
Email your pixel code
Get help''

I've had sales over the past 7 days, so I'm unsure why this discrepancy is occurring. Additionally, I'm not seeing any sales reflected in the Facebook Ad Manager, even though I have sales and can see them in the statistics on Shopify.

Could you please assist me with this issue?