BUG - mattermost 9.11.2 can't access collabra by https

[mickey0425]

I'm setting up Mattermost and Collabora as containers on my local machine. The configuration seems to work fine in HTTP mode, allowing successful use of the Collabora plugin from the Mattermost

When running curl -k https://mm.example.com:9980, I can reach the Collabora container, and it returns OK, indicating the container is accessible over HTTPS.

However, when using HTTPS, I encounter issues where Collabora fails to connect properly. The logs show the following error：

wsd-00001-00032 2024-10-31 12:54:54.710937 +0000 [ websrv_poll ] ERR  #30: Error while handling poll at 0 in websrv_poll: #30 (handshake): unknown. BIO error: 167772316, rc: -1: error:0A00009C:SSL routines::http request:
20F0DF77FFFF0000:error:0A00009C:SSL routines:ssl3_get_record:http request:ssl/record/ssl3_record.c:345:
| net/Socket.cpp:566
wsd-00001-00032 2024-10-31 12:54:54.736478 +0000 [ websrv_poll ] ERR  #30: Error while handling poll at 0 in websrv_poll: #30 (handshake): unknown. BIO error: 167772316, rc: -1: error:0A00009C:SSL routines::http request:
20F0DF77FFFF0000:error:0A00009C:SSL routines:ssl3_get_record:http request:ssl/record/ssl3_record.c:345:
| net/Socket.cpp:566
wsd-00001-00022 2024-10-31 12:58:15.568172 +0000 [ coolwsd ] WRN  Waking up dead poll thread [main], started: false, finished: false| net/Socket.hpp:723
wsd-00001-00001 2024-10-31 12:58:15.568347 +0000 [ coolwsd ] WRN  Waking up dead poll thread [main], started: false, finished: false| net/Socket.hpp:723

The logs show the following error, and in Mattermost, the document editing button does not appear, preventing document editing: