wyre.xdai.io widget is broken

Description

## Scope and Deliverables I get this error when I click the "Buy $5" button in Exchange.js on wyre.xdai.io ``` Uncaught TypeError: Cannot read property 'Widget' of undefined at e.value (wyre.js:26) at onClick (Exchange.js:2050) at Object.<anonymous> (react-dom.production.min.js:49) at f (react-dom.production.min.js:69) at react-dom.production.min.js:73 at j (react-dom.production.min.js:140) at C (react-dom.production.min.js:169) at E (react-dom.production.min.js:158) at I (react-dom.production.min.js:232) at kt (react-dom.production.min.js:1716) at Ms (react-dom.production.min.js:5922) at Oe (react-dom.production.min.js:660) at Ct (react-dom.production.min.js:1758) at Ps (react-dom.production.min.js:5950) at At (react-dom.production.min.js:1735) value @ wyre.js:26 onClick @ Exchange.js:2050 (anonymous) @ react-dom.production.min.js:49 f @ react-dom.production.min.js:69 (anonymous) @ react-dom.production.min.js:73 j @ react-dom.production.min.js:140 C @ react-dom.production.min.js:169 E @ react-dom.production.min.js:158 I @ react-dom.production.min.js:232 kt @ react-dom.production.min.js:1716 Ms @ react-dom.production.min.js:5922 Oe @ react-dom.production.min.js:660 Ct @ react-dom.production.min.js:1758 Ps @ react-dom.production.min.js:5950 At @ react-dom.production.min.js:1735 ``` Edit: Update 4.06.2019: Still a problem on wyre.xdai.io. ## Roles bounty gardener: @TimDaub / 10% bounty worker: name / 75% bounty reviewer: name / 15%