main.CRITICAL: Invalid template file:

Question

I created module for email header

Block: INW\EmailOverride\Block\EmailOverride // information about which image show

template: extraheader.phtml // contain a image tag

I put this in custom email template

{{block class="INW\EmailOverride\Block\EmailOverride" name="extraheader_header" orderId=$myvar1 template="INW_EmailOverride::extraheader.phtml"}}

when I am sending email from 2 places

1. Vendor1_Module1 Observer send email: email sent, working fine no problem extraheader working fine

2. Vendor2_Module2 Controller send email: email sent but extraheader part missing and showing error in log

main.CRITICAL: Invalid template file: 'INW_EmailOverride::extraheader.phtml' in module: 'INW_EmailOverride' block's name: 'emailoverride_0' [] []