I’ve been using KDE Connect for several months on my Linux Mint 22.3 systems. This morning, the SMS app does not display any contacts. I checked ~/.local/share/kpeoplevcard/* and it had a directory with contacts. I tried resyncing by removing that directory and restaring it on my phone and laptop. It did repopulate the contacts but they still do not appear in the SMS app. I tried the “Refresh” from the menu.
Other KDE Connect functionality seems fine; e.g., I can do Find Device, etc.
Clarification: It isn’t just that it isn’t displaying contact names and only showing numbers. The window is completely empty, doesn’t display history, nothing.