What is the problem? Please be detailed.
I don't know why the form is not uploaded - there is no hint where I can find the error; above all, I am using the odk build online
What ODK tool and version are you using? And on what device and operating system version?
What steps can we take to reproduce the problem?
What you have you tried to fix the problem?
Anything else we should know or have? If you have a test form or screenshots or logs, attach here.