Magento 2.3: not able to change transactional email logo

[PankajS_Magento]

I am trying to replace the transactional email logo in Magento 2.3. I am uploading a .png image from theme option under this path.

Content -> Design Configuration -> Theme Edit -> Transactional email

I am getting this error:

A technical problem with the server created an error. Try again to continue what you were doing. If the problem persists, try again later.

Do you guys have any fix for this issue?

[gelanivishal · Accepted solution]

Hello @PankajS_Magento ,

File path : /vendor/magento/module-theme/view/adminhtml/ui_component/design_config_form.xml

Find and replace :

<field name="header_logo_src" formElement="fileUploader">

To

<field name="header_logo_src" formElement="imageUploader">

<field name="head_shortcut_icon" formElement="fileUploader">

To

<field name="head_shortcut_icon" formElement="imageUploader">

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[PankajS_Magento]

@gelanivishal 

But its not looking correct way to edit any vendor file. Would you suggest?

[gelanivishal]

Hello @PankajS_Magento ,

Yes, It is not right but it's an default issue on v2.3 and which is fixed now. So you can change in core file. In future, if you are upgrading Magento then it will be replaced. 

You can see this issue's PR here https://github.com/magento/magento2/pull/20092/files

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[PankajS_Magento]

Okay @gelanivishal 

Thanks, Hope it will work for me.

[gelanivishal]

Hello @PankajS_Magento ,

Don't forgot to run static content deploy command. 

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[gelanivishal]

Hello @PankajS_Magento ,

If the issue didn't resolve then let me know.

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[marketing_mindz]

For magetno 2 email transactional logo. We also change in email module in vendor folder.

Spoiler

In vendor/magento/module-email/view/adminhtml/ui_component/design_config_form.xml

online number 16 approx replace the code with this

<field name="email_logo" formElement="fileUploader">

replace with 

<field name="email_logo" formElement="imageUploader">

[hackrons]

The same way we have to update fileUploader to imageUploader in the tag on the below files as well.

./vendor/magento/module-email/view/adminhtml/ui_component/design_config_form.xml
./vendor/magento/module-catalog/view/adminhtml/ui_component/design_config_form.xml
./vendor/magento/module-backend/view/adminhtml/ui_component/design_config_form.xml
./vendor/magento/module-swatches/view/adminhtml/ui_component/design_config_form.xml
./vendor/magento/module-theme/view/adminhtml/ui_component/design_config_form.xml

[magezon]

Find it hard to config the email logo due to lack of coding skills? Read this article to find the key https://ext-5487952.livejournal.com/1677.html