Can't deploy latest zxchat 2.00 zimlet after zextras upgrade

zimbra version: 8.7.11_GA_1854.FOSS
Zextras: 2.6.0

Hi have just upgraded to the latest zextras suite 2.6.0 and I can't deploy the updated 2.0 zxchat zimlet either by the install process or manually uploading the ZIP zimlet from the wiki link.

In the case of the zip zimlet I receive an error:

Server error encountered
Message: system failure: error deploying Zimlet Error code: service.FAILURE Method: [unknown] Details:soap:Receiver

The zxchat zimlet is not displaying in the web clients at the moment. The rest of the zextras suite seems to be working as designed.

Any ideas?