I2C, NACK on ESP32 boards (SHT21 sensor)

Software I2c fails too on the ESP32.

Result with soft I2c:

Uncaught Error: I2C Error: Timeout (rd)
 at line 1 col 68
...is.i2c.readFrom(this.addr,3),b=a[0]<<­8|a[1]&-4;this.checkCrc...

in function "readTemperature" called from line 41 col 53
console.log('SHT Temperature:', sht.readTemperature());

That this.i2c.readFrom(this.addr,3)... fragment is from the minified module.

Result with hardware I2C:

ERROR: jshI2CRead:, Operation timeout because the bus is busy
Uncaught CRC Error

The Uncaught CRC Error comes from this line of the module.