Pre-start logs show the following error
4027FEF9CE7F0000:error:0308010C:digital envelope routines:inner_evp_generic_fetch:unsupported:../crypto/evp/evp_fetch.c:349:Global default library context, Algorithm (PKCS12KDF : 0), Properties (<null>)
4027FEF9CE7F0000:error:1180006B:PKCS12 routines:PKCS12_PBE_keyivgen_ex:key gen error:../crypto/pkcs12/p12_crpt.c:55:
4027FEF9CE7F0000:error:11800067:PKCS12 routines:PKCS12_item_i2d_encrypt_ex:encrypt error:../crypto/pkcs12/p12_decr.c:191:
4027FEF9CE7F0000:error:11800067:PKCS12 routines:PKCS12_pack_p7encdata_ex:encrypt error:../crypto/pkcs12/p12_add.c:133:
This is a known issue fixed in credhub release 2.12.56 and later. If this instance of credhub is being used with concourse you can check what versions are compatible by checking the concourse-bosh-deployment versions.yml file. Simply change from master branch to the tagged version of your concourse deployment. For example if deploying concourse 7.11.2 then credhub version 2.12.60 should be used.