Uploading of GIF not working

On: cms.demo.onehippo.com

After going to content -> image perspective

Adding file:

Click upload:

This error eppears. On localhost i get the same result happend and log presents:

[PluginContext.unregisterService:245] plugin org.hippoecm.frontend.plugins.reviewedactions.HippostdEditorFactoryPlugin is unregistering service at 549fe9c7-05a8-4c02-8a00-f6eb94a5739c.admin that wasn't registered.