[900 RC1 Build 51] Error 500 when edit default message

[paulnoelcholot]

Describe the bug and add attachments

ON MULTISTORE

On customer service page, if I want to modify default message, I have an error 500

PR-2025-05-14_15.57.23.mp4

It's a REGRESSION

Expected behavior

no error 500

Steps to reproduce

1. Enable multistore in shop parameters > general
2. Advanced parameters > multistore > add a new shop
3. Set an URL for this shop
4. BO > Customer service
5. Check Default message
6. Modify the message
7. Save
8. Error

PrestaShop version(s) where the bug happened

9.0.0 RC1 build 51