RoverC:88:23: error: 'I2C_ERROR_NO_BEGIN' was not declared in this scope

 uint8_t IIC_ReState = I2C_ERROR_NO_BEGIN;

                       ^~~~~~~~~~~~~~~~~~

C:\Users\toro\Documents\Arduino\RoverC\RoverC.ino:88:23: note: suggested alternative: 'ESP_ERR_NO_MEM'

 uint8_t IIC_ReState = I2C_ERROR_NO_BEGIN;

                       ^~~~~~~~~~~~~~~~~~

                       ESP_ERR_NO_MEM

The answer is in the error, following the suggestion fixes the error.

Now, besides that it works i have no idea if the replacement is correct logically. The Const-Names suggest yes, but there might be more to it...
If the replacement is universally ok, should a github pull request be made?

EDIT:
There is an error/warning thrown that i had overlooked.
So, just doing the replacement seems like not enough...

RoverC.ino.cpp:1:
...\AppData\Local\Arduino15\packages\m5stack\hardware\esp32\2.0.2/
tools/sdk/esp32/include/esp_common/include/esp_err.h:31:37: 
warning: unsigned conversion from 'int' to 'uint8_t' {aka 'unsigned char'} changes value from '257' to '1' [-Woverflow]
 #define ESP_ERR_NO_MEM              0x101   /*!< Out of memory */
                                     ^~~~~
...\Arduino\RoverC\RoverC.ino:88:23: note: in expansion of macro 'ESP_ERR_NO_MEM'
 uint8_t IIC_ReState = ESP_ERR_NO_MEM;
                       ^~~~~~~~~~~~~~