The issue you’re experiencing with the SP Page Builder front-end editor login appears to be caused by the Joomdle extension plugins. These plugins are interfering with the standard Joomla login process, which is resulting in the 504 Gateway Timeout error.
To resolve this, you can:
- Temporarily disable the Joomdle plugins via your Joomla administrator panel.
- Alternatively, contact Joomdle support for assistance in configuring their plugins to work properly with front-end login and SP Page Builder.
Once the conflicting plugins are disabled or properly configured, your front-end login should work without issue.
Best regards,