Thanks Morgan S. I already had the neopixel clock working perfectly but I was using a RTC module. I wanted to add the NTP server to automatically set the time and eliminate the RTC module and the need to manually set the time.
And thanks to RayLivingston. The problem is for a beginner in Arduino and no knowledge of the C language, most of these error messages are cryptic to me and hard to fix if you don't know what they mean or what is causing them.