Trying to match the level of effort you put into your request for help I will link and existing guide related to Nextcloud and Collabora:
I recommend starting from the bottom to identify parts of the guide that have been superseded by new things since the guide was written. This is especially important since the guide was made for Dragonfish, ie. a version of TrueNAS that used the old Apps framework (K3s instead of Docker).
Perhaps if you had posted some detail of where and how it gets “stuck” someone knowledgeable here could have provided you with more relevant and specific help.