# Unable to drag and drop svg elements into designer after installing .modl

**URL:** <https://forum.inductiveautomation.com/t/unable-to-drag-and-drop-svg-elements-into-designer-after-installing-modl/109889>\
**Category:** Module Development\
**Tags:** ignition81, perspective\
**Created:** [August 18, 2025, 2:10pm UTC](https://forum.inductiveautomation.com/t/unable-to-drag-and-drop-svg-elements-into-designer-after-installing-modl/109889 "2025-08-18T14:10:44Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![paul-griffith](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/paul-griffith/32/37249_2.png) [@paul-griffith](https://forum.inductiveautomation.com/u/paul-griffith)\
**Post date:** [August 18, 2025, 4:31pm UTC](https://forum.inductiveautomation.com/t/unable-to-drag-and-drop-svg-elements-into-designer-after-installing-modl/109889/4 "2025-08-18T16:31:55Z")

</div>

![image](https://us1.discourse-cdn.com/inductiveautomation/optimized/3X/3/a/3a3e874ed1cddc189572a64de4db8dca7b5b92b6_2_690x27.png)

Hmm.

I think the class loading error in the example is causing the fetch of the component Javascript to fail (return a 404 page) which may be causing knock-on effects that end up with drag and drop not working. At least, that's my best guess at the moment.

If you go into the `OneComponentGatewayHook` and remove this method implementation:

```python
    @Override
    public void onMountedResourceRequest(String resourcePath, HttpServletResponse response) {
        super.onMountedResourceRequest(resourcePath, response);
    }

```

Then optimize imports and rebuild the module, it should work. The underlying problem is the Jetty upgrade we did in 8.1.49:

> [@Ignition 8.1 Jetty 12 Upgrade](https://forum.inductiveautomation.com/t/ignition-8-1-jetty-12-upgrade/105482):
>
> Tomorrow's (4-24-2025) 8.1.49-SNAPSHOT early access build includes a major upgrade of [Jetty](https://jetty.org/) - the third party library Ignition depends on for powering the Gateway's embedded web server. The primary reason for the major upgrade is: [Jetty v10 is end of life](https://github.com/jetty/jetty.project/issues/10485) and will no longer receive critical bug fixes and security patches. This is at odds with our commitment for long term support of Ignition 8.1. Performing a major upgrade of a core dependency such as Jetty is a major undertaking and not withou…

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