Component content dialog stops working

[herbergt]

I´m getting the error below when trying to open a component content dialog. If I try without the proxy, everything works fine, but when I access through the proxy, the dialog only opens the first time the page is loaded, after closing the dialog, it will not open the next time I try to.

Here the console output of the browser:

GET http://localhost:3000/content/my-project/home/test/jcr:content/guideContainer.infinity.json?_=1604609768621 404 (Not Found)  granite.js?browsersync=1604609768424:266   

Error: DuplicateDefinitionError: a type with name 'coral-icon' is already registered
    at HTMLDocument.t (coralui3.js?browsersync=1604609768424:3803)
    at Object.Coral.register (coralui3.js:6463)
    at coralui3.js:12478     coralui3.js?browsersync=1604609768424:3803

Software versions
Apache Sling Log Tracer: 1.0.6
aemfed: 0.1.1
AEM: 6.5