Major fixes required

Firstly this plugin does not work at all with buddypress legacy, I get the followibg error

ncaught ReferenceError: _ is not defined
    at getURL (bp-activity-link-preview.js?ver=1.0.0:102)
    at scrap_URL (bp-activity-link-preview.js?ver=1.0.0:20)
    at bp-activity-link-preview.js?ver=1.0.0:160
getURL @ bp-activity-link-preview.js?ver=1.0.0:102
scrap_URL @ bp-activity-link-preview.js?ver=1.0.0:20
(anonymous) @ bp-activity-link-preview.js?ver=1.0.0:160
setTimeout (async)
(anonymous) @ bp-activity-link-preview.js?ver=1.0.0:158
dispatch @ jquery.min.js?ver=3.5.1:2
v.handle @ jquery.min.js?ver=3.5.1:2

Secondly whilst it does work occasionally with nouveua it fails with longer urls, throwing off the following error:

Uncaught TypeError: Cannot read property '0' of undefined
    at setURLResponse (bp-activity-link-preview.js?ver=1.0.0:80)
    at Object.<anonymous> (bp-activity-link-preview.js?ver=1.0.0:67)
    at c (jquery.min.js?ver=3.5.1:2)
    at Object.fireWith [as rejectWith] (jquery.min.js?ver=3.5.1:2)
    at Object.<anonymous> (wp-util.min.js?ver=5.7.1:2)
    at c (jquery.min.js?ver=3.5.1:2)
    at Object.fireWith [as rejectWith] (jquery.min.js?ver=3.5.1:2)
    at l (jquery.min.js?ver=3.5.1:2)
    at Object.abort (jquery.min.js?ver=3.5.1:2)
    at Object.abort (wp-util.min.js?ver=5.7.1:2)

Can you fix thi and make it more robust?