Update: I send email to apple support team and told them about this issue. Two days later, it is solved and i was able to download my app from Testflight. So if you are having the same issue, try email them and get help.
Update: I send email to apple support team and told them about this issue. Two days later, it is solved and i was able to download my app from Testflight. So if you are having the same issue, try email them and get help.