minor fix

gulpfile.js

@@ -56,9 +56,10 @@ gulp.task('eslint', () => (
   .pipe(eslint.format())
 ));
 
-const cacheObj = templateCache();
+var cacheObj;
 
 gulp.task('templates', () => {
+  cacheObj = templateCache();
   var stream = merge2([
     gulp.src(paths.cache),
     gulp.src(paths.templates).pipe(cacheObj),

src/options/components/sync-service.html

@@ -4,7 +4,7 @@
       v-el:enabled @change="update">
     <span>{{labelText}}</span>
   </label>
-  <button @click="authenticate" :disabled="authState!=='unauthorized'">
+  <button @click="authenticate" :disabled="service.authState!=='unauthorized'">
     {{labelAuthenticate}}
   </button>
   <button :disabled="disableSync" class="sync-start" @click="retry">