Tagify Remove

I can’t figure out how to pass the value of the item I’m removing from a tagify field to the server connect so I can delete it from the database.

I added the message so I could see what was coming out but get an error in the console.

bootstrap-modbox.min.js:30 Uncaught (in promise) Error: The “body” or “message” configuration option is required (string).
at new modbox (bootstrap-modbox.min.js:30:1251)
at bootstrap-modbox.min.js:12:1859
at new Promise ()
at #buildPromiseModal (bootstrap-modbox.min.js:12:1831)
at modbox.alert (bootstrap-modbox.min.js:41:620)
at bootbox.alert (dmxBootbox5.js:7:3611)
at n._execStep (dmxAppConnect.js:7:46750)
at dmxAppConnect.js:7:46179

Any pointers would be most appreciated!
Thanks.