In the inspector UI of the camera tracker / "Solve" tab / "Tracker Filtering" panel :
If you uncheck "Maximum Solve Error", it disables the "Maximum Track Error" slider instead ... so there is some cut & paste error in the Qt UI code linking the checkbox to the slider

Resolve Studio - Ryzen 5800X3D - AMD RX6600 / NVidia RTX 4070 (switching between the 2) - Linux