Error: Error building site: failed to render pages

[tusharsathe1]

I am getting below errors:

Error: Error building site: failed to render pages: render of "home" failed: execute of template failed: template: index.html:2:6: executing "main" at <partial "about.html" .>: error calling partial: "C:\Hugo\my-site-2\themes\hugo-resume\layouts\partials\about.html:12:77": execute of template failed: template: partials/about.html:12:77: executing "partials/about.html" at <substr .Site.Params.email 5>: error calling substr: start position out of bounds for 0-byte string

I read previous posts and my config.toml file does have email address added. How can I fix it?