I had this issue, turns out there’s 2 lines which need deleting in zADS1115.cpp
Delete or comment out those wire.end and wire.begin lines at the top.
These lines get called before void setup which causes the teensy to continually hang and reboot
ADS1115_lite::ADS1115_lite(uint8_t i2cAddress) {
//Wire.end();
//Wire.begin();
_i2cAddress = i2cAddress;
_gain = ADS1115_REG_CONFIG_PGA_2_048V; /* +/- 6.144V range (limited to VDD +0.3V max!) */
_mux = ADS1115_REG_CONFIG_MUX_DIFF_0_1; /* to default */
_rate = ADS1115_REG_CONFIG_DR_128SPS; /* to default */
}