If I had to guess, you tried to update twice. The first time failed (error would've appeared), the second worked, but a basic flaw in a package manager trashed the install.
Uninstall CA from the plugins tab (it'll be there with a jigsaw icon), then reinstall should do the trick. If it doesn't, a reboot will definitely do it.
https://raw.githubusercontent.com/Squidly271/community.applications/master/plugins/community.applications.plg