Hello, if DingTalk flashes back, you can try again by the following steps:
1. End the DingTalk process, re-login and try again;
2. Check if the network is normal, switch network re-entry;
3. Check whether the version is up-to-date, update the version or uninstall and reload;
4. If you still can't follow the above steps, you can submit the screenshot to the fault feedback technician for troubleshooting.