@Shuttleu Thank you for testing on the HP. That confirms the fix on real firmware.
The task error after a menu enrollment. This is a FOS bug, not the agent. The menu item runs the enrollment with no task scheduled. When the enrollment finishes, FOS tries to close the task. The server answers “No Active Task found”, and FOS shows an error. The enrollment itself succeeded. The fix is in FOS release 20261106-134043. After a menu run, FOS now says that no task is scheduled and ends normally. The server records the enrollment on the host only when you schedule the task from the web UI.
FOG Agent. You found the cause. Uninstall keeps C:\ProgramData\FOG on purpose. It holds the machine’s key, its certificate and the trusted CA, so a reinstall keeps the same identity. The reinstall kept the CA of your earlier server, so every connection failed and the token was never used. Agent v0.1.21 fixes this. Setup now checks the stored trust against the server. If it no longer verifies, setup settles trust again like a first install, and the host enrolls again with the token. Until you install v0.1.21, deleting C:\ProgramData\FOG before the reinstall is the right workaround.
Your server certificate comes from your company CA, which Windows already trusts. So no fingerprint is needed, as the probe said. Leave CAFINGERPRINT out on these machines.