Failed to add session to [] with URI []: JSON Exception| wsd/DocumentBroker.cpp:3641

[ZoXx]

Hello everyone,

i have a nextcloud instance at a hoster on a server. this connects via nginx to my docker at home, which is running the latest version of collabora code.

two different nextcloud systems are currently accessing the docker instance for testing.

the first nextcloud can open documents etc. without any problems.
the second nextcloud (same settings) cannot open any documents.

I see the following error message in the collabora docker:
wsd-00001-00110 2025-03-06 10:19:57.954122 +0100 [ docbroker_005 ] ERR Failed to add session to [XXX] with URI [XXX]: JSON Exception| wsd/DocumentBroker.cpp:3641 wsd-00001-00110 2025-03-06 10:19:57.954140 +0100 [ docbroker_005 ] ERR Error while starting session on XXX for socket #36. Terminating connection. Error: JSON Exception| wsd/RequestVettingStation.cpp:545 wsd-00001-00110 2025-03-06 10:19:57.954344 +0100 [ docbroker_005 ] WRN ClientSession must be known| wsd/DocumentBroker.cpp:4816 wsd-00001-00110 2025-03-06 10:19:57.968589 +0100 [ docbroker_005 ] WRN #82: Unassociated Kit (116) disconnected unexpectedly| wsd/COOLWSD.cpp:2925 wsd-00001-00110 2025-03-06 10:19:57.968610 +0100 [ docbroker_005 ] WRN #82: Unknown Kit process closed with pid -1| wsd/COOLWSD.cpp:2936 wsd-00001-00110 2025-03-06 10:19:58.074556 +0100 [ docbroker_005 ] WRN ClientSession must be known| wsd/DocumentBroker.cpp:4816 sh: 1: /usr/bin/coolmount: Operation not permitted sh: 1: /usr/bin/coolmount: Operation not permitted sh: 1: /usr/bin/coolmount: Operation not permitted

Can anyone here help me?
I have checked all the settings, but can't find the error and until a few days ago, access still worked without any problems.

[Bunyaplus]

I have this issue aswell for a few days now. It occured after I updated Nextcloud and Collabora to the latest version! So far I haven't been able to find a fix.

[jmechnich]

I tried downgrading from collabora/code:24.04.13.1.1 to collabora/code:24.04.12.4.1 but no luck. So it is quite possible that https://github.com/nextcloud/richdocuments is the cause of the problem (or NC31 in general).

In my case, the issue appears for a specific user only.

[Bunyaplus]

I did the same thing but it didn't fix it for me either :(

All users in my database can't open or edit documents.

[ZoXx]

The error comes from Nextcloud Office 8.6.2.
I have replaced it with Nextcloud Office 8.6.1 and now everything is running smoothly again!

[Bunyaplus]

May I ask how you downgraded your Nextcloud Office version? I'd like to try this too!

[ZoXx]

deactivate the “nextcloud office” app in nextcloud and then remove it.
then download the previous version from the website (https://apps.nextcloud.com/apps/richdocuments/releases?platform=9) and upload it via ftp to “apps” and activate it in nextcloud.

[Bunyaplus]

Amazing it works again! Thanks a lot!