Developer Questions

Hi. I'm trying to set up xApp on a Typescript project but to no avail.

Package version: "xumm-xapp-sdk": "1.5.1"

Code sample:

export const useLoginPrompt = (uuid: string | undefined): void => {
  // Initialized xapp client, basically `xapp = new xApp()`
  const { xapp } = useXappClient();

  useEffect(() => {
    if (uuid) {
      xapp
        .openSignRequest({ uuid })
        ?.then((d) => {
          console.log(
            'openSignRequest response:',
            d instanceof Error ? d.message : d
          );
        })
        // eslint-disable-next-line no-console
        .catch((e) => console.log('Error:', e.message));

      xapp.on('payload', (response) => {
        if (response.reason === 'DECLINED') {
          // Declined handlers…
        }
        if (response.reason === 'SIGNED') {
          // Signed handlers…
        }
      });
    }
  }, [xapp, uuid]);
};

My questions:

1. Why doesn't openSignRequest() open sign request prompt?
2. Why do I receive could not contact Xumm App Host?
3. Why at the beginning of the log I see "Doc not alive >= 1 sec, stalling for 0.401"?

Debugger log:

Log:
(readystatechange: [ complete ])
Log:
Doc Ready...
Log:
Doc not alive >= 1 sec, stalling for 0.401
Log:
documentReadyPromise resolved

Log:
["xAppActionAttempt Attempt 0 » Retry","openSignRequest",{"uuid":"my-uuid-string"}]
Log:
["xAppActionAttempt Attempt 1 » Retry","openSignRequest",{"uuid":"my-uuid-string"}]
Log:
["xAppActionAttempt Attempt 2 » Retry","openSignRequest",{"uuid":"my-uuid-string"}]
Log:
["xAppActionAttempt Attempt 3 » Retry","openSignRequest",{"uuid":"my-uuid-string"}]
Log:
["xAppActionAttempt Attempt 4 » Retry","openSignRequest",{"uuid":"my-uuid-string"}]
Log:
["xAppActionAttempt Attempt 5 » Retry","openSignRequest",{"uuid":"my-uuid-string"}]
Log:
["xAppActionAttempt Attempt 6 » Retry","openSignRequest",{"uuid":"my-uuid-string"}]
Log:
["xAppActionAttempt Attempt 7 » Retry","openSignRequest",{"uuid":"my-uuid-string"}]
Log:
["xAppActionAttempt Failed after attempt 8","openSignRequest",{"uuid":"my-uuid-string"}]
Log:
["XAPP openSignRequest response:","xApp.openSignRequest: could not contact Xumm App Host"]