Adding I2C stack causes errors.

As soon as I am adding I2C in LoraSample project it is creating issues in resolving symbols.

it can not resolve 'iic_master_instance_ctrl_t' and 'VECTOR_NUMBER_IIC0_RXI' causing I2C interrupt handled by reset vector. As you can see in this image, I2C has no associated ISR.

Please help me resolve this issue soon.