vuejs with leaflet(1.6.0) error says wkt.fromObject is not a function

[ryuchaehwa]

Hello, I have a problem that wkt.fromObject() methods which doesn't work in vuejs web. I've checked other issues below(google api issue) but i'm using leaflet and I'm not sure how to fix it. Please check below and advise me.

package.json

"wicket": "^1.3.6"
"leaflet": "^1.6.0",
"terraformer": "^1.0.6",
"terraformer-wkt-parser": "^1.1.2",

code

if (layer instanceof L.LinkPolyline) {

          let geometry = wkt.fromObject(layer.toGeoJSON().geometry).write()
}

p.s I'm converting vanilla leaflet.js to vuejs framework at the moment. This code works in our original vanilla js project with leaflet 1.0.6 but with npm installed, it just doesn't work. Also, If I import the module like this

import * as wkt from 'wicket' 

wicket__WEBPACK_IMPORTED_MODULE_21__.fromObject is not a function

there's another error so I'm importing it like this:
let wkt = require('wicket')

Regards,