Hi All,

Could you suggest on blow error, i'm not able to understand.

> /var/log/guam/console.log <

2020-02-11 18:26:06.759 [error] <0.4317.0> SSL: certify: ssl_alert.erl:88:Fatal error: certificate unknown

> /var/log/guam/error.log <

2020-02-11 18:26:06.759 [error] <0.4317.0> SSL: certify: ssl_alert.erl:88:Fatal error: certificate unknown

> /var/log/guam/console.log <

2020-02-11 18:26:06.759 [error] <0.4282.0> gen_server <0.4282.0> terminated with reason: no match of right hand value {error,{tls_alert,"certificate unknown"}} in kolab_guam_session:accept_client/1 line 154

> /var/log/guam/error.log <

2020-02-11 18:26:06.759 [error] <0.4282.0> gen_server <0.4282.0> terminated with reason: no match of right hand value {error,{tls_alert,"certificate unknown"}} in kolab_guam_session:accept_client/1 line 154

> /var/log/guam/console.log <

2020-02-11 18:26:06.760 [error] <0.4282.0> CRASH REPORT Process <0.4282.0> with 0 neighbours exited with reason: no match of right hand value {error,{tls_alert,"certificate unknown"}} in kolab_guam_session:accept_client/1 line 154 in gen_server:terminate/7 line 812

> /var/log/guam/error.log <

2020-02-11 18:26:06.760 [error] <0.4282.0> CRASH REPORT Process <0.4282.0> with 0 neighbours exited with reason: no match of right hand value {error,{tls_alert,"certificate unknown"}} in kolab_guam_session:accept_client/1 line 154 in gen_server:terminate/7 line 812

> /var/log/guam/console.log <

2020-02-11 18:26:06.760 [error] <0.422.0> Supervisor {<0.422.0>,kolab_guam_listener} had child session started with {kolab_guam_session,start_link,undefined} at <0.4282.0> exit with reason no match of right hand value {error,{tls_alert,"certificate unknown"}} in kolab_guam_session:accept_client/1 line 154 in context child_terminated

> /var/log/guam/error.log <

2020-02-11 18:26:06.760 [error] <0.422.0> Supervisor {<0.422.0>,kolab_guam_listener} had child session started with {kolab_guam_session,start_link,undefined} at <0.4282.0> exit with reason no match of right hand value {error,{tls_alert,"certificate unknown"}} in kolab_guam_session:accept_client/1 line 154 in context child_terminated

> /var/log/guam/console.log <

2020-02-11 18:26:08.028 [error] <0.4327.0> SSL: certify: ssl_alert.erl:88:Fatal error: certificate unknown

> /var/log/guam/error.log <

2020-02-11 18:26:08.028 [error] <0.4327.0> SSL: certify: ssl_alert.erl:88:Fatal error: certificate unknown

Thanks,
Narendra L