# GrapeJSBuilder Error 404 when opening Generator **URL:** \ **Category:** Mautic 5 Install/Upgrade Support\ **Created:** [November 5, 2025, 2:13pm UTC](https://forum.mautic.org/t/grapejsbuilder-error-404-when-opening-generator/36860 "2025-11-05T14:13:17Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![gvvaillant](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/gvvaillant/32/13986_2.png) [@gvvaillant](https://forum.mautic.org/u/gvvaillant)\ **Post date:** [November 5, 2025, 2:13pm UTC](https://forum.mautic.org/t/grapejsbuilder-error-404-when-opening-generator/36860/1 "2025-11-05T14:13:17Z")
**Your software** My Mautic version is: 5.2.8 My PHP version is: 8.1 My Database type and version is: Mariadb 10.5 My mautic is installed in subDirectory, everything is working except Grapejs. **Your problem** My problem is: Error 404 on Grapejs when opening generator. 404 on : [https://mydomain.fr/s/grapesjsbuilder/media?page=1](https://mydomain.fr/s/grapesjsbuilder/media?page=1) The site\_url in config is : [https://mydomain.fr/marketing](https://mydomain.fr/marketing) i got the same error on everything related to grapejs. These errors are showing in the log: The errors are display in the Console of my browser Steps I have tried to fix the problem: refreshing the app cache Forcing the subdirectory in grapejs config I’ve temporary solved the problem by forcing the subdirectory in my proxy, but if you know why Grapejs is not taking sur subdirectory.