Comodo is experiencing technical issues at the moment, which may cause failure of activation / reissue / renewal of all Comodo certificates.
Comodo technical team is aware of the issue and is working to have this resolved as soon as possible.
Maintenance window is approximately 2 hours
We keep in touch with them and will keep you updated via this status post.
Thank you for your patience and understanding.
SSLs.com Support Team
Update @ 09:31 UTC | 05:31 EDT
We are glad to inform that the issue has been resolved: Comodo certificates are activated normally without any errors, validation emails come in time and supply correct validation codes.
Should you face any issue at this time, please contact our support team at https://support.namecheap.com
Thank you for your patience and understanding in this matter.