gtm_add failing due to CERT error
I am trying to cluster to GTM devices using the gtm_add command, but this is failing with this error:
ERROR: found "END CERT..." without BEGIN at line: 0.
ERROR: Malformed certificates found in local /config/httpd/conf/ssl.crt/server.crt.
But when I check the mentioned file it looks like a valid certificate:
more /config/httpd/conf/ssl.crt/server.crt
-----BEGIN CERTIFICATE-----
MIIHFjCCBP6gAwIBAgIDbUVxMA0GCSqGSIb3DQEBCwUAMGwxDDAKBgNVBAoTA0lORzERMA8GA1UE
CxMIU2VydmljZXMxIDAeBgNVBAsTF0NlcnRpZmljYXRlIEF1dGhvcml0aWVzMScwJQYDVQQDEx5J
TkcgQ29ycG9yYXRlIEludGVybmFsIENBIC0gRzMwHhcNMjQwNjI0MTQyMzAyWhcNMjUwNzI0MTMw
...
E1Zg8g9QlL+jksX7ew0tIuZPNGPbhPE3StATtD7b4oi1TYjVfIwn79DluSwkIp5hwVDrAcW/B5T6
zK+sJJlib4ZeCnV19cCkwBnYyRz0p46VrwXw7i3bYeC8Cq4Of++LaYaXDuhOVq/V61phJRoGTlRU
vOII3wHBmXiXQv7MIScQQbmKaBRC2lxu0gAJV9a8vzpXfN6T+n7PxNBH4AuNdR5KeeG7
-----END CERTIFICATE-----
Also via the browser the correct certificate is shown.
Any suggestions on what the problem could be?