RTC_DATA_ATTR Failure

Gist of E220_Ticker_Test_Receiver.ino RTC_DATA_ATTR is not saving variables when going to deep sleep. Trying to create elapsed timer using Ticker library; minuteTicker.attach keeps re-initalizing intterrupt. Another RTC variable does not work; bootcount is always  1. I did my best to follow article: Ebyte LoRa E220 device for Arduino, esp32 or esp8266: WOR microcontroller and esp32 dev v1 shield .   William