Getting error while submitting app for marketplace

Hi,
Could you assist me with resolving an error that's preventing me from submitting my Zendesk support app for marketplace inclusion? When attempting to validate my app, I receive an error message indicating that something went wrong and that I should contact Zendesk support or try again.

"Something went wrong when trying to validate your app. Please try again or contact Zendesk support"

Additionally, there's a pop-up message in the upper-right corner that reads "Unexpected Token T. resource... not a valid JSON".

Any guidance or assistance in resolving this matter would be greatly appreciated.