@avr39-ripe : @piperpilot I tested within my environment and could use WifiAccessPoint.enable(true) without any issues. @avr39-ripe : You should check the epc1=0x40106f3a within your map file to check the location of the issue.
@avr39-ripe : Can't do much today. If you can check some options would help. For mapfile : In there are the starting addresses of all functions. Look for the function with a starting address which is "the largest but smaller than" epc1=0x40106f3a. That is the function in which the error occurred.