There's something wrong with Pinterest tag. I asked Pinterest customer service for help and they told me that they found my website has 1. Manually added tags, 2. GTM tags, and 3. Shopify tags. They suggest me that I have to remove the other two tags. I have removed GTM tags. As for the Shopify tags， I can't find this tag on my site and I even haven't installed Shopify tags. How to find this tag on Shopify?
There's the screenshot in the Pinterest customer service reply email.
Welcome! Sorry to hear you're experiencing issues with your tags.
You should be able to find the Shopify tag in your site's injection code header section.
I looked into how to easily add custom code to the header and footer of your Shopify website.
You can download the XO Insert Code Shopify App - HERE.
Here are some screenshots that illustrate how this is done.
I hope this helps! 🤓📌