1, network problem. It may be because the network is unstable or the uploaded file is too large that the upload failed. You can try to change the network environment or wait until the network is stable before uploading again.
2. Server problems. Uploading may fail due to server failure or system maintenance. You can try uploading again later, or contact the relevant customer service to consult the solution.
3. Error in punching information. It may be because the punching information is incorrectly filled in, such as the date, time and place filled in are not up to the requirements. You can carefully check the punching information to confirm whether it is filled in correctly.
4. The format of the punch-in picture is incorrect. It may be because the uploaded punch-in picture format is incorrect, such as unsupported picture format, picture size exceeding the limit, etc. You can try changing the picture format or compressing the picture size, and then upload it again.