Ty_Eeberfest wrote: You have the wrong WiFi Manager library. What you have is something somebody forked from the "real" Tzapu WiFi Manager codebase. I've never heard of this particular fork before and have no idea how it may differ from the real thing. Best you uninstall it and install the right one as found at:
Ian wrote: The last part of that error message is the bit that counts:
You have two conflicting definitions, and you need to remove one of them. If you go to "C:\Applications\Atmel\Arduino\libraries\WiFi" and rename the file "WiFiUdp.h" to be something like "WiFiUdp.h.old" then it should compile.