Single product template error

Bricks Version: 1.3.7
Browser: Chrome 90
OS: Windows

When I build a template for single product page, I use some HTML & CSS code to dispaly a sheet in tab-content. Then I save it. When I preview the template , it says: There has been a critical error on this website.

Hi Ivy,
Welcome to the forum!

Sounds like an issue with your html code or a missing semicolon or something.
Can you share the code or a live link?

Best regards,

Thanks Timmse.
I deleted the template and rebuilt it. I will check the code carefully when I use it.