feat(prejoin): handle disabled precall test.

package-lock.json

       }
     },
     "lib-jitsi-meet": {
-      "version": "github:jitsi/lib-jitsi-meet#f370cccdfba6f9190ecb4afc3d78552d9f3ad57c",
-      "from": "github:jitsi/lib-jitsi-meet#f370cccdfba6f9190ecb4afc3d78552d9f3ad57c",
+      "version": "github:jitsi/lib-jitsi-meet#4980889b24716c383311aadd760d958f6ff58277",
+      "from": "github:jitsi/lib-jitsi-meet#4980889b24716c383311aadd760d958f6ff58277",
       "requires": {
         "@jitsi/js-utils": "1.0.2",
         "@jitsi/sdp-interop": "1.0.3",

package.json

     "jquery-i18next": "1.2.1",
     "js-md5": "0.6.1",
     "jwt-decode": "2.2.0",
-    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#f370cccdfba6f9190ecb4afc3d78552d9f3ad57c",
+    "lib-jitsi-meet": "github:jitsi/lib-jitsi-meet#4980889b24716c383311aadd760d958f6ff58277",
     "libflacjs": "github:mmig/libflac.js#93d37e7f811f01cf7d8b6a603e38bd3c3810907d",
     "lodash": "4.17.19",
     "moment": "2.19.4",

react/features/prejoin/actions.js

  */
 export function makePrecallTest(conferenceOptions: Object) {
     return async function(dispatch: Function) {
-        await JitsiMeetJS.precallTest.init(conferenceOptions);
-
-        const results = await JitsiMeetJS.precallTest.execute();
+        try {
+            await JitsiMeetJS.precallTest.init(conferenceOptions);
+            const results = await JitsiMeetJS.precallTest.execute();
 
-        dispatch(setPrecallTestResults(results));
+            dispatch(setPrecallTestResults(results));
+        } catch (error) {
+            logger.debug('Failed to execute pre call test - ', error);
+        }
     };
 }