You must have ElvUI to use this addon.
Lockslap is the original author of this plugin, therefore all credit and respect should be given to him/her and not myself. I simply took this addon and resolved the coding conflicts with the removal of First Aid in Battle For Azeroth. If you have any issues with the plugin please submit a ticket on the site, I will respond as soon as I can.
Link to his/her original addon is here.