# Developing an email theme that could be used with grapesjsbuilder

**URL:** https://forum.mautic.org/t/developing-an-email-theme-that-could-be-used-with-grapesjsbuilder/21739
**Category:** Product Support
**Created:** [November 23, 2021, 9:54pm UTC](https://forum.mautic.org/t/developing-an-email-theme-that-could-be-used-with-grapesjsbuilder/21739 "2021-11-23T21:54:23Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![techbill](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/techbill/32/8325_2.png) [@techbill](https://forum.mautic.org/u/techbill)
#### Post date: [November 23, 2021, 9:54pm UTC](https://forum.mautic.org/t/developing-an-email-theme-that-could-be-used-with-grapesjsbuilder/21739/1 "2021-11-23T21:54:23Z")

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**Your software**  
My Mautic version is: 4.02  
My PHP version is: 7.4  
My Database type and version is: MySQL 8+

**Your problem** - More of a question … Not a problem  
My problem is: - see below -

These errors are showing in the log:

Steps I have tried to fix the problem:

It not a “problem” but a question …

I create an email theme and installed it in my theme management. It got a legacy and email tag on it but i wanted to be able to edit in in grapesjsbuilder.

This is my first theme and I created it with standard html … I assume I need to rebuild the theme using MJML to be able to use grapesjsbuilder editor with it in Mautic?

Bill