Certificate not getting issued.

[ShanthiTV]

Hi,

While trying to set up the certificate manager, the certificate is not getting generated and failing with an error message, Failed to wait for order resource "ratings-web-cert-xxxxxxxxxxx" to become ready: order is in "invalid" state. After trying the Describe command on the order till Challenges, the Challenges has got an error message, Accepting challenge authorization failed: acme: authorization error for frontend.xx-xxx-xxx-xxx.nip.io: 400 urn:ietf:params:acme:error:connection: xx-xxx-xxx-xxx: Fetching http://frontend.xx-xxx-xxx-xxx.nip.io/.well-known/acme-challenge/1NDm2l_DY4s0KaC25XVyYvU3rP2_Xm5XtSow95ZF9Uo: Timeout during connect (likely firewall problem).
Note : The firewall has been disabled and still the problem persists.

Thanks,
Shanthi