Generic Exception Error 404 even when tried with different Wi-fi connections

2. What app or server are you using and on what device and operating system? Include version numbers.
Google Cloud Platform on Samsung TAB A ( T258) Windows 10 OS

3. What you have you tried to fix the problem?
Different Wi-Fi and Mobile Internet Connections have been tried in uploading the files to the server yet the same Generic Exception Error 404 appears each time

4. What steps can we take to reproduce the problem?
I have no idea what the cause of the problem is so the reproduction path is unknown.

I was told uploading bulk files at a time may cause this so I should try sending the finalized form one by one yet this has also not been successful.

5. Anything else we should know or have? If you have a test form or screenshots or logs, attach below.
On ODK collect, the server Icon is missing at General Settings.

My colleague is also experiencing the same issue. What is the solution?