Too few arguments to function Drupal\Core\Form\ConfigFormBase::__construct()

Working on it.

The ConfigFormBase constructor was changed starting in Drupal core 10.2, so the HTML Mail configuration form won't work in any currently supported version of Drupal core.

🌱 The future of the HTML Mail module Needs review

I've updated the HtmlConfigurationFormForm.php with backward compatibility. pls check.

Hi @arunsahijpal
The MR worked in my D11 site.

I was able to reproduce the error through steps to reproduce provided in issue summary, and the MR successfully applied and solved the issue for me, and the changes looks good to me,
Thus moving this to RTBC!!