Submission error seen in Collect android app- Error: Generic Exception: Error: (404)

So what should I do and what could be the problem

OK, could you share with me 2 screenshots of your devices General Settings>Server. One, from the device where you are able to submit the submissions without any issue and the other where you are not able to submit the submissions successfully. I would like to compare the two of them to see if there is anything I can see.