After several days of running the service daemon, I am unable to connect with the editor

hello?
I configured the document to be edited on the web using ‘Nextcloud’ and ‘Collabora Online Development Edition’. I installed the package on ‘Ubuntu 22.04’. And the execution environment is configured as follows.

apt install coolwsd code-brand
coolconfig set ssl.enable false
coolconfig set ssl.termination true
coolconfig set server_name cloud.cafefallin.com
systemctl restart coolwsd

With the above settings, it works smoothly with ‘Nextcloud’. However, after a few days, it is not connecting to the service daemon below. Checking the system log, I see the following message:

How can i solve the problem?

Dec 19 02:30:04 cafefallin coolwsd[712220]: wsd-712220-712229 2022-12-19 02:30:04.919164 +0000 [ prisoner_poll ] TRC  #19: Wrote 201 bytes of 201 buffered data| net/Socket.hpp:1438
Dec 19 02:30:04 cafefallin coolwsd[712220]: wsd-712220-712229 2022-12-19 02:30:04.919182 +0000 [ prisoner_poll ] INF  ChildProcess ctor [712232].| wsd/COOLWSD.hpp:59
Dec 19 02:30:04 cafefallin coolwsd[712220]: wsd-712220-712229 2022-12-19 02:30:04.919200 +0000 [ prisoner_poll ] TRC  #19: Resetting thread affinity while in transit (was 0x7f828d6cb640)| net/Socket.hpp:329
Dec 19 02:30:04 cafefallin coolwsd[712220]: wsd-712220-712229 2022-12-19 02:30:04.919217 +0000 [ prisoner_poll ] TRC  Calling addNewChild in disposition's move thing to add to NewChildren| wsd/COOLWSD.cpp:3388
Dec 19 02:30:04 cafefallin coolwsd[712220]: wsd-712220-712229 2022-12-19 02:30:04.919232 +0000 [ prisoner_poll ] TRC  Adding a new child 712232 to NewChildren| wsd/COOLWSD.cpp:542
Dec 19 02:30:04 cafefallin coolwsd[712220]: wsd-712220-712229 2022-12-19 02:30:04.919248 +0000 [ prisoner_poll ] INF  Have 1 spare child after adding [712232]. Notifying.| wsd/COOLWSD.cpp:547
Dec 19 02:30:04 cafefallin coolwsd[712220]: wsd-712220-712229 2022-12-19 02:30:04.919296 +0000 [ prisoner_poll ] TRC  #18: Revents: 0x0| net/Socket.hpp:1297
Dec 19 02:30:04 cafefallin coolwsd[712220]: wsd-712220-712229 2022-12-19 02:30:04.919317 +0000 [ prisoner_poll ] TRC  #19: Removing socket (at 2 of 3) from prisoner_poll| net/Socket.cpp:468
Dec 19 02:30:04 cafefallin coolwsd[712220]: wsd-712220-712229 2022-12-19 02:30:04.919341 +0000 [ prisoner_poll ] TRC  #17: setupPollFds getPollEvents: 0x1| net/Socket.hpp:859
Dec 19 02:30:04 cafefallin coolwsd[712220]: wsd-712220-712220 2022-12-19 02:30:04.919340 +0000 [ coolwsd ] TRC  Have 1 new children.| wsd/COOLWSD.cpp:5390
Dec 19 02:30:04 cafefallin coolwsd[712220]: wsd-712220-712229 2022-12-19 02:30:04.919392 +0000 [ prisoner_poll ] TRC  #18: setupPollFds getPollEvents: 0x1| net/Socket.hpp:859
Dec 19 02:30:04 cafefallin coolwsd[712220]: wsd-712220-712220 2022-12-19 02:30:04.919422 +0000 [ coolwsd ] INF  WSD initialization complete: setting log-level to [warning] as configured.| wsd/COOLWSD.cpp:5406
Dec 19 02:30:04 cafefallin coolwsd[712220]: wsd-712220-712229 2022-12-19 02:30:04.919434 +0000 [ prisoner_poll ] TRC  ppoll start, timeoutMicroS: 5000000 size 2| net/Socket.cpp:337

.....

Dec 19 02:30:57 cafefallin coolwsd[712220]: wsd-712220-712244 2022-12-19 02:30:57.601075 +0000 [ websrv_poll ] ERR  #19: Socket write returned -1 (EPIPE: Broken pipe)| net/Socket.hpp:1432
Dec 19 02:30:57 cafefallin coolwsd[712220]: wsd-712220-712244 2022-12-19 02:30:57.601096 +0000 [ websrv_poll ] ERR  #19: Socket write returned -1 (EPIPE: Broken pipe)| net/Socket.hpp:1432
Dec 19 02:30:57 cafefallin coolwsd[712220]: wsd-712220-712244 2022-12-19 02:30:57.601110 +0000 [ websrv_poll ] WRN  #19 is shutting down but 64 bytes couldn't be flushed and still remain in the output buffer.| net/WebSocketHandler.hpp:832
Dec 19 02:30:57 cafefallin coolwsd[712220]: wsd-712220-712244 2022-12-19 02:30:57.601130 +0000 [ websrv_poll ] ERR  #19: Attempted to remove: 1481 which is > size: 0 clamped to 0| net/Socket.hpp:1234
Dec 19 02:30:57 cafefallin coolwsd[712220]: wsd-712220-712244 2022-12-19 02:30:57.601150 +0000 [ websrv_poll ] ERR  #19: Socket write returned -1 (EPIPE: Broken pipe)| net/Socket.hpp:1432
Dec 19 02:30:59 cafefallin coolwsd[712248]: Forced Exit with code: 70
Dec 19 02:30:59 cafefallin coolwsd[712248]: kit-712248-712230 2022-12-19 02:30:59.010901 +0000 [ kit_spare_002 ] FTL  Forced Exit with code: 70| common/Util.cpp:1110
Dec 19 02:30:59 cafefallin coolwsd[712220]: wsd-712220-712244 2022-12-19 02:30:59.646281 +0000 [ websrv_poll ] WRN  Prisoner connection disconnected but without valid socket.| wsd/COOLWSD.cpp:3275
Dec 19 02:30:59 cafefallin coolwsd[712220]: wsd-712220-712244 2022-12-19 02:30:59.646358 +0000 [ websrv_poll ] WRN  An unassociated Kit disconnected.| wsd/COOLWSD.cpp:3290
Dec 19 02:30:59 cafefallin coolwsd[712220]: wsd-712220-712244 2022-12-19 02:30:59.646375 +0000 [ websrv_poll ] WRN  Prisoner connection disconnected but without valid socket.| wsd/COOLWSD.cpp:3275
Dec 19 02:30:59 cafefallin coolwsd[712220]: wsd-712220-712244 2022-12-19 02:30:59.646390 +0000 [ websrv_poll ] WRN  An unassociated Kit disconnected.| wsd/COOLWSD.cpp:3290

What could be the cause of the error?
Please help me.

Do you have a terminating reverse proxy set up for CODE? What do you see when you open https://<host name of CODE server>/hosting/discovery?