It is not detecting the proper PNG. In particular, it is looking for "Game Settings" button but it is not seeing it.Unknown Status
This implies to me that, you are either:
1) Not running in Fullscreen Windowed mode
2) or did not have the proper/correct PNG files
3) or using the wrong resolution only 1920x1080, 1600x900 and 1280x720 are supported.
4) or D3 is not running as suggested by Reset: Diablo III not running
Though this is not a problem, it will use Battle.net launcher to run D3, login D3,
However, looking on your log.txt further, there is no coherent info I could piece out off.
After the Unknown Status log @ 5.54AM, the next line is 5.56 and nothing else. This implies to me that you cut some info in between, or paused it. it is not coherent to make out any useful info to diagnose.
Please let it run its course, do not cut any info out and post the log.txt from where it run till it stopped.