vue with typescript can't use Vue.use(Loading)

[LynxChina]

main.ts?cbf3:27 Uncaught ReferenceError: MuseLoading is not defined
at eval (main.ts?cbf3:27)
at Module../src/renderer/main.ts (renderer.js:4968)
at webpack_require (renderer.js:728)
at fn (renderer.js:102)
at Object.1 (renderer.js:5136)
at webpack_require (renderer.js:728)
at renderer.js:795
at renderer.js:798