Unable to trigger email with Email Id

I have created a simple Email Template to triggered it before login to site
On Back end code i have written below function and calling it from front end (Login Page),
Now getting error from Log
“jsonPayload”:{
“message”:"Error: Error: Unable to handle the request. Contact the site administrator or view site monitoring logs for more information. "
}
//Login.jsw

export async function SendEmailForContact(EmpEmail) 
{
    const queryResults =await contacts.queryContacts()
    .eq('info.emails.email', EmpEmail)
    .find();
    let QResult=queryResults.items;
    if(QResult.length>0)
    {
      let ContactId=QResult[0]._id;
      const triggeredEmailTemplate = 'My Template Name with no variables';
      try 
        {
          await wixCrmBackend.triggeredEmails.emailContact(triggeredEmailTemplate, 
             ContactId);
        } catch (error) 
        {
          console.error(' error #%d ',error);
        }
    }
}

Please help

When checking the logs in the site dashboard (Site dashboard> Developer Tools> Logs> Site Events) do you get any additional information that may not be shown in the browser dev tools?