A. Clone the record, reference the clone in place of the original record, then delete elements (such as table rows) until the template renders.

B. Copy and paste the content into a text editor and run a syntax checker, modify and replace HTML until the template renders.

C. Download the template content via Dataloader and analyze the HTML source, modify and replace HTML until the template renders.

D. Edit the template content and view as source, then modify HTML until clicking Check Syntax results in
"NO Errors"