Socket #23 SSL BIO error: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca

Hey Guys,

I am using collabora online using docker and my API is hosted on editor.ict.nust.edu.pk] now i am facing an error. Kindly help me to resolve this issue

libreoffice-app | Ready to accept connections on port 9980.
libreoffice-app |
libreoffice-app | wsd-00007-00050 2021-10-27 08:13:15.422539 [ websrv_poll ] ERR Socket #23 SSL BIO error: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca (0: Success)| ./net/SslSocket.hpp:289
libreoffice-app | wsd-00007-00050 2021-10-27 08:13:15.422792 [ websrv_poll ] ERR Error while handling poll for socket #23 in websrv_poll: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca| net/Socket.cpp:314
libreoffice-app | wsd-00007-00050 2021-10-27 08:13:15.448274 [ websrv_poll ] ERR Socket #23 SSL BIO error: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca (0: Success)| ./net/SslSocket.hpp:289
libreoffice-app | wsd-00007-00050 2021-10-27 08:13:15.448396 [ websrv_poll ] ERR Error while handling poll for socket #23 in websrv_poll: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca| net/Socket.cpp:314
libreoffice-app | wsd-00007-00050 2021-10-27 08:13:27.437897 [ websrv_poll ] WRN client - server version mismatch, disabling browser cache. Expected: 6a844e4| wsd/FileServer.cpp:285
libreoffice-app | wsd-00007-00052 2021-10-27 08:13:27.673367 [ docbroker_001 ] ERR loading document exception: JSON Exception| wsd/DocumentBroker.cpp:1445
libreoffice-app | wsd-00007-00052 2021-10-27 08:13:27.673465 [ docbroker_001 ] ERR Failed to add session to [/api/wopi/files/GetFile/ahmed] with URI [http://editor.ict.nust.edu.pk/api/wopi/files/GetFile/ahmed]: JSON Exception| wsd/DocumentBroker.cpp:1407
libreoffice-app | wsd-00007-00052 2021-10-27 08:13:27.673500 [ docbroker_001 ] ERR Error while loading : JSON Exception| wsd/LOOLWSD.cpp:3465
libreoffice-app | wsd-00007-00052 2021-10-27 08:13:27.673587 [ docbroker_001 ] ERR No DocBroker found, or DocBroker marked to be destroyed. Terminating session ToClient-006| wsd/ClientSession.cpp:332
libreoffice-app | wsd-00007-00052 2021-10-27 08:13:27.673691 [ docbroker_001 ] ERR No DocBroker found, or DocBroker marked to be destroyed. Terminating session ToClient-006| wsd/ClientSession.cpp:332
libreoffice-app | wsd-00007-00052 2021-10-27 08:13:29.674155 [ docbroker_001 ] ERR Invalid or unknown session [006] to remove.| wsd/DocumentBroker.cpp:1484
libreoffice-app | wsd-00007-00052 2021-10-27 08:13:29.674396 [ docbroker_001 ] ERR No socket associated with WebSocketHandler 0x7fa44000ffd0| ./net/WebSocketHandler.hpp:125
libreoffice-app | sh: 1: /usr/bin/loolmount: Operation not permitted
libreoffice-app | frk-00046-00046 2021-10-27 08:13:30.718771 [ forkit ] ERR Failed to unmount [/opt/lool/child-roots/CkqmQhxDVggoJa9n/tmp].| common/JailUtil.cpp:68
libreoffice-app | sh: 1: /usr/bin/loolmount: Operation not permitted
libreoffice-app | frk-00046-00046 2021-10-27 08:13:30.756674 [ forkit ] ERR Failed to unmount [/opt/lool/child-roots/CkqmQhxDVggoJa9n/lo].| common/JailUtil.cpp:68
libreoffice-app | sh: 1: /usr/bin/loolmount: Operation not permitted
libreoffice-app | frk-00046-00046 2021-10-27 08:13:30.778663 [ forkit ] ERR Failed to unmount [/opt/lool/child-roots/CkqmQhxDVggoJa9n].| common/JailUtil.cpp:68
libreoffice-app | wsd-00007-00045 2021-10-27 08:13:38.024478 [ prisoner_poll ] WRN Prisoner connection disconnected but without valid socket.| wsd/LOOLWSD.cpp:2130

Please guys help me to resolve this issue