20:10:08.039: adding 92 milliseconds of audio buffering, total audio buffering is now 580 milliseconds
20:10:08.107: adding 46 milliseconds of audio buffering, total audio buffering is now 626 milliseconds
20:10:16.402: adding 162 milliseconds of audio buffering, total audio buffering is now 789 milliseconds
This is usually an indication of general system overload.
20:10:25.025: Output 'adv_stream': Number of dropped frames due to insufficient bandwidth/connection stalls: 730 (20.2%)
It does not look like your internet connection can sustain 4500kbps, or else this error is just because your internet connection failed.
20:08:58.417: base resolution: 2560x1440
Try setting this lower. NDI doesn't use much CPU and doesn't compress much; it needs a lot of bandwidth to operate. a 1080p60 stream can easily use 100Mbps sustained, and I am not sure whether that plugin respects the video scaling settings or not. Either way you might be better starting with a smaller canvas resolution.