It's possible your
libcurl dependencies had corrupted somehow, although, this is no fault of QuickBox as this issue isn't being raised elsewhere. I have known a couple of server installs that I have helped with in the past where a few dependencies were corrupted (usually through interrupted
apt update and/or
apt upgrade). Those however, caused completely different issues wherein it affected pulling the updates via
git for QuickBox. I would say you can reboot, although, in most server instances there shouldn't be need to reboot as it rarely fixes a problem in linux... and when it does... it's a fluke.