Install on remote agent

We have installed xray on our bamboo server. The developers have asked me to install this on the Windows remote agents as they are seeing the error

{noformat}

command 22-Jun-2017 19:43:07   Substituting variable: ${bamboo.branch_jira_fix_version} with 6.7

error   22-Jun-2017 19:43:08   Could not execute task  no Plugin with key 'com.xyleme.bamboo.plugin.xray:xray.reporter' is installed.

{noformat}

Have you any Ideas on how to proceed? It has installed on the local agents.

Kind regards,

Paula