When I place a Modal on my page, my page doesn't load. Only the background. This is the error from the Chrome Console:

modal.js:69 Uncaught TypeError: jQuery(...).modal is not a function
    at n.update (modal.js:69:1)
    at n.render (modal.js:64:1)
    at n.constructor (BaseComponent.js:20:1)
    at n (appConnect.js:526:1)
    at e.hasOwnProperty.e.constructor (appConnect.js:556:1)
    at new n (appConnect.js:526:1)
    at n.$addChild (BaseComponent.js:213:1)
    at n.<anonymous> (BaseComponent.js:288:1)
    at Object.walk (dom.js:180:1)
    at dom.js:185:1

Hello, either jquery is missing on your page or it is included after the modal include.