Nextcloud problem with collabora/code "Unauthorized WOPI host"

I have been using SWAG + nextcloud + collabora/code in docker for a couple of years and I never had any problems. Now when I try to open an excel document in nextcloud I get this error: Unauthorized WOPI host

I have not changed anything in the docker-compose configuration, I have not changed anything in the collaborate configuration in nextcloud and I have tried to use the new file collabora.subdomain.conf in SWAG (configuration much shorter than the previous one), but I have not obtained results .

This is the collaborative log, any ideas?

frk-00034-00034 2021-01-13 12:21:54.704639 [ forkit ] ERR Failed to get the realpath of [/etc/timezone] (ENOENT: No such file or directory)| common/FileUtil.cpp:256,
frk-00034-00034 2021-01-13 12:21:54.704668 [ forkit ] ERR Failed to get the realpath of [/etc/localtime] (ENOENT: No such file or directory)| common/FileUtil.cpp:256,
kit-00041-00034 2021-01-13 12:21:54.867729 [ kit_spare_002 ] ERR Failed to get the realpath of [/etc/timezone] (ENOENT: No such file or directory)| common/FileUtil.cpp:256,
kit-00041-00034 2021-01-13 12:21:54.867778 [ kit_spare_002 ] ERR Failed to get the realpath of [/etc/localtime] (ENOENT: No such file or directory)| common/FileUtil.cpp:256,
wsd-00007-00040 2021-01-13 12:21:54.892268 [ docbroker_001 ] ERR No acceptable WOPI hosts found matching the target host [nextcloud.mydomain.it] in config.| wsd/Storage.cpp:292,
wsd-00007-00040 2021-01-13 12:21:54.892397 [ docbroker_001 ] ERR loading document exception: No acceptable WOPI hosts found matching the target host [nextcloud.mydomain.it] in config.| wsd/DocumentBroker.cpp:1428,
wsd-00007-00040 2021-01-13 12:21:54.892421 [ docbroker_001 ] ERR Failed to add session to [/index.php/apps/richdocuments/wopi/files/95863_ocntf34q2vee] with URI [https://nextcloud.mydomain.it/index.php/apps/richdocuments/wopi/files/95863_ocntf34q2vee?access_token=1kfMiBmtVY1U35TtHgrrKDpHaBq8NF8D&access_token_ttl=0&reuse_cookies=_ga%3DGA1.2.384873026.1610381983]: No acceptable WOPI hosts found matching the target host [nextcloud.mydomain.it] in config.| wsd/DocumentBroker.cpp:1390,
wsd-00007-00040 2021-01-13 12:21:54.892441 [ docbroker_001 ] ERR Unauthorized Request while loading session for /index.php/apps/richdocuments/wopi/files/95863_ocntf34q2vee: No acceptable WOPI hosts found matching the target host [nextcloud.mydomain.it] in config.| wsd/LOOLWSD.cpp:3408,
wsd-00007-00040 2021-01-13 12:21:54.892495 [ docbroker_001 ] ERR No DocBroker found, or DocBroker marked to be destroyed. Terminating session ToClient-002| wsd/ClientSession.cpp:331,
wsd-00007-00040 2021-01-13 12:21:54.892511 [ docbroker_001 ] ERR No DocBroker found, or DocBroker marked to be destroyed. Terminating session ToClient-002| wsd/ClientSession.cpp:331,
wsd-00007-00040 2021-01-13 12:21:54.907804 [ docbroker_001 ] ERR Invalid or unknown session [002] to remove.| wsd/DocumentBroker.cpp:1467,
wsd-00007-00033 2021-01-13 12:21:56.892823 [ prisoner_poll ] WRN Prisoner connection disconnected but without valid socket.| wsd/LOOLWSD.cpp:2087,
sh: 1: /usr/bin/loolmount: Operation not permitted,
frk-00034-00034 2021-01-13 12:21:57.735287 [ forkit ] ERR Failed to unmount [/opt/lool/child-roots/c4WS0B7rgt1qoZ9y/tmp].| common/JailUtil.cpp:68,
sh: 1: /usr/bin/loolmount: Operation not permitted,
frk-00034-00034 2021-01-13 12:21:57.756299 [ forkit ] ERR Failed to unmount [/opt/lool/child-roots/c4WS0B7rgt1qoZ9y/lo].| common/JailUtil.cpp:68,
sh: 1: /usr/bin/loolmount: Operation not permitted,
frk-00034-00034 2021-01-13 12:21:57.773252 [ forkit ] ERR Failed to unmount [/opt/lool/child-roots/c4WS0B7rgt1qoZ9y].| common/JailUtil.cpp:68,