500 Error with Kobo Server

I am having problem uploading my form and recieve below error from kobo server, not really sure that is this a problem in my form or else.

500 Error
If this is a significant error that needs to be fixed, please send a support request to support@kobotoolbox.org with information about what triggered this error.

Need an urgent help on this. I attached the form here. Tool_4_Observation_Form_HFs.xlsx (55.1 KB)

Hi @naseem.akbarzai! Kobo isn't under ODK's governance so for issues with the Kobo server, your best bet is to email support@kobotoolbox.org.

Your best bet for Kobo related issues would probably head over to https://community.kobotoolbox.org/