Hi @Sai Praveen,

This error appears because Odoo cannot find an email template that applies to the move type of your invoice, which is usually out_invoice (Customer Invoice).

How to fix it in Odoo Online (SaaS):

1. Go to:

   
   Settings > Activate Developer Mode > Technical > Email > Templates
   

2. Look for a template named:

   
   Invoice: Send by email
   

3. Check that the template has:
   • Applies to = Journal Entry
   • A domain filter such as:

     
     [('move_type', '=', 'out_invoice')]
     

4. If the template is missing or inactive:
   • Activate an existing one or duplicate another.
   • Make sure the domain applies to customer invoices.

If you cannot edit templates (Odoo Online limitation):

Since you're using Odoo Online (SaaS), you might not be able to change templates directly. In that case:

• Use the "Share" or "Print & Send by Email" options as a workaround.

Additional note:

This issue can happen when:

• The default email template was deleted or changed
• A migrated database didn't include proper email template bindings

Thanks it's worked