Two-factor authentication codes are not accepted
1. Open Instagram mobile application or web version and log into your account. Check if the received code is accepted there. In case it is, attempt to login within Combin.
2. Use one of the Instagram backup codes instead of code received by email/SMS. In order to access the backup codes, open Instagram application > Settings > Two-factor authentication > Get Backup Codes.
If Instagram backup codes do not come through either, please disable the two-factor authentication in the Instagram account settings, login within Combin and then enable the two-step auth back again.