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[18.0] module: mass_mailing | Bug when launching Mass Mailing #1330

@assistinfone-git

Description

@assistinfone-git

Odoo Version

  • 16.0
  • 17.0
  • 18.0
  • Other (specify)

Steps to Reproduce

Hello,

I am encountering a JavaScript error when launching the Mass Mailing module in Odoo 18 and also when modifying an email template.

Environment

Odoo version: 18

OCB On Premise

Image

Steps to Reproduce

  • Open the Mass Mailing module.

  • Create or edit an email template.

The error occurs during loading and also when switching themes in the email editor.

Error Message
Odoo Client Error

UncaughtPromiseError > TypeError
Uncaught Promise > Cannot read properties of null (reading '1')

Occured on assistinfone.gestion18.mind-and-go.net on 2026-03-04 09:42:17 GMT

TypeError: Cannot read properties of null (reading '1')
at https://assistinfone.gestion18.mind-and-go.net/web/assets/9630369/web.assets_web.min.js:19520:436
at Array.find ()
at https://assistinfone.gestion18.mind-and-go.net/web/assets/9630369/web.assets_web.min.js:19520:279
at Array.find ()
at fontToImg (https://assistinfone.gestion18.mind-and-go.net/web/assets/9630369/web.assets_web.min.js:19520:217)
at toInline (https://assistinfone.gestion18.mind-and-go.net/web/assets/9630369/web.assets_web.min.js:19514:41)
at https://assistinfone.gestion18.mind-and-go.net/web/assets/9630369/web.assets_web.min.js:21585:879
at async MassMailingHtmlField._switchThemes (https://assistinfone.gestion18.mind-and-go.net/web/assets/9630369/web.assets_web.min.js:21628:139)
at async HTMLAnchorElement. (https://assistinfone.gestion18.mind-and-go.net/web/assets/9630369/web.assets_web.min.js:21608:288)

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