Had issues getting the ownCloud client to work after doing an inplace upgrade from Ubuntu 20.04 LTS to 22.04LTS. Read various other articles that didn’t really help me. Most did point to the official ownCloud repository and in there is a file called install.sh, looking at that this would do all the tasks required to get the repository working and install the ownCloud client as well. After doing this, without uninstalling the current non working client, it was working. The only thing was that I had to disable and enable the “Launch on Startup” option and it was done. It is safe to say that the client in Ubuntu’s own repository will also get updated at some point in time and it becomes a non issue. Below are the steps performed.

• Download the install.sh file via a webbrowser (you can of course use wget as well): https://download.owncloud.com/desktop/ownCloud/stable/latest/linux/Ubuntu_22.04/INSTALL.sh
• Open the terminal and executed the following command in the folder where the INSTALL.sh file was downloaded): sudo sh .\INSTALL.sh
• Start the ownCloud client
• Disable and Enable the “Launch on Startup” setting on the Settings tab.