HTML error found Broken HTML has been detected in your theme's sections/product-template.liquid fi

[Angelarev05]

I just installed the free Donate Mate app and now I get this error. I didn't do anything but download the app. Can someone help me?  Here is the full error: 

HTML error found

Broken HTML has been detected in your theme's sections/product-template. liquid file. Check that there are no missing or extra HTML tags present.

If you haven't made changes to this code, contact support for help resolving the issue.

[MS-WEB-DESIGNER]

Dear @Angelarev05 

Please share the screenshot.

[Angelarev05]