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Invalid conversion from 'const char*' to 'const uint8_t*

I am trying to use the LMIC library for my ESP32 Heltec. I am getting the following errors: Arduino: 1.8.9 (Windows 10), Board: "Heltec WiFi LoRa 32, Disabled, Default, 240MHz (WiFi/BT), QIO, 40MHz, ...
GitHub

ESP32 & TFT_eSPI::textWidth(char const*, int)

I have encountered a "Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled." issue on my Widora Air clone. I'm on Arduino IDE 1.8.5, Win10 ...