Example Code: CameraWebServer
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 I get these errors then the compilation .. fails. "sketch/app_httpd.cpp: In function 'esp_err_t stream_handler(httpd_req_t*)': 
 app_httpd.cpp:770:37: error: 'ra_filter_run' was not declared in this scope
 uint32_t avg_frame_time = ra_filter_run(&ra_filter, frame_time);
 ^~~~~~~~~~~~~
 sketch/app_httpd.cpp:770:37: note: suggested alternative: 'ra_filter_t'
 uint32_t avg_frame_time = ra_filter_run(&ra_filter, frame_time);
 ^~~~~~~~~~~~~
 ra_filter_t
 Multiple libraries were found for "WiFi.h"
 Used: /Users/jamesbrake/Library/Arduino15/packages/m5stack/hardware/esp32/2.0.4/libraries/WiFi
 Not used: /Applications/Arduino.app/Contents/Java/libraries/WiFi
 exit status 1
 'ra_filter_run' was not declared in this scope"Any ideas? Mac OS 
 Arduino IDE 1.8.4Thanks!