A React component suspended while rendering, but no fallback UI was specified

You have 2 options:

1. Without Using suspense, you can configure that i18n.js like this:

   i18n
     .use(XHR)
     .use(LanguageDetector)
     .init({
       react: { 
         useSuspense: false //   <---- this will do the magic
       }
   });
   

2. Using Suspense, for example:

   <Suspense fallback={<div>Loading... </div>}>
         <App />
   </Suspense>