I2C Master/Slave Transmit and Receive of One Byte of Data

I'm trying to transfer and receive data on 2 Arduino Uno devices. The master sends a byte of data to light one of 7 LEDs on the slave at address of 0x60. The slave sends back the status of 7 switch positions on its IO lines in the form of a byte to the master. I would like to view the byte representing the switch positions on the serial monitor for the master - confirming that it was received and processed. I've been able to run sketches that transmit data or receive data, as soon as I move to both, I get a series of errors.

Does anyone have some sketches to perform the transmit and receive functions with I2C? Please advise, thank you, Jerry

as soon as I move to both, I get a series of errors.

Are you not interested in fixing them?