Insert and remove the basket into the air fryer. Is the microswitch now clicking? (You can use an ohm meter or continuity checker to test the switch operation.

If the microswitch is not turning off (opening), you may need to file some material off the top of the screw you added to the interlock pin to make it shorter.

If the microswitch is not turning on (closing), you may need to adjust the screw you added to the interlock pin to make it longer.