OTA breaks. not working at all

[jkandasa]

MC[I]: FW Config Internal(Type:65535, Version:65535, Blocks:65535, md5sum:[---------md5sum-not-set---------])
MC[I]: FW Config Response(Type:1, Version:1, Blocks:1520, md5sum:[c51ee13cbd11ded58f19844a92ee3a62])
MC[I]: Firmware upgrade started...
ERROR[7]: MD5 Failed: expected:c51ee13cbd11ded58f19844a92ee3a62, calculated::rc11cd:00cc010rs:c=sdd6=A11d6eA

ESP 8266 community version: 2.4.1
MyControllerDevice: 1.0.0

[jkandasa]

Workaround: Do compile with ESP 8266 community version: 2.3.0