Reduce your text and display scaling to 100% so you can see the email and password fields.
https://support.microsoft.com/en-us/windows/change-your-screen-resolution-and-layout-in-windows-5effefe3-2eac-e306-0b5d-2073b765876b
I don't think the simulation has any knowledge of these things (assuming you're referring to the CL650's fuel truck and not the sim's "ground services").
Try enabling the "Zink plugin bridge" in X-Plane's Graphics settings. And if still an issue upload your Log.txt from the simulator's install directory, please.
Passing 290 kts? With the Yaw Damper? This means you have Yaw input being detected by the sim. Check your hardware calibration, and for axis noise. Also if you’re feet are resting on the pedals.
There is not. There never has been. It's only AviTab. If you need help with using AviTab I suggest speaking to the maintainers of that plugin.
Settings for CL650 are accessible via the Challenger 650 menu in the top bar.
Stop believing what "AI" search tools tell you.