Collabora server setting not "sticking"

Hi I’m running NC 20.02. I’m also running collabora document server. I thought everything was working OK until I went to change my collabora designated server within the Nextcloud admin panel. I type in the name of my new server and click save. A green check indicates its useful. I click away from the page and then go back to it, and the server line is back to the old server. I do the same thing, and the same behavior results. Very frustrating. Does anyone know the file where I could manually change the setting within the file rather than the interface?