Problems with adding Weather Widget//Mozaik demo v1

[francois2sap]

item	info	notes
node	v8.10.0	output from node --version
npm	3.5.2	output from npm --version
mozaik-ext-weather	^1.2.0	available in project's package.json
mozaik version	1.4.4	available in project's package.json
mozaik-demo version	v1	version of the demo used, depends on which method you used to setup your Mozaïk dashboard
component	mozaik-ext-weather	name of the extension's component or client if it's related to the extension's client
browser	Chrome	browser used, applyable if the issue is not related to the client

Expected behavior

Display the widget, in the wanted place.

Actual behavior

the page is blank, no error, but if I remove the weather widget it works.

Steps to reproduce

-- > I installed the demo v1
--> yarn install && yarn start works
--> yarn install mozaik-ext-weather
-->Configured Config.js with
api: {
aws: {
region: 'eu-west-1'
},
weather: {
apiToken:'api...'
},
--> relaunch with yarn install && yarn start
And it is not working! I'm a rookie so it might be a stupid error, thanks for reading it, all help is appreciated!