How to set the parameters for SEN2COR

Hello All,
I have installed the sen2cor through the plugin of SNAP. It is installed properly. But while executing the Atmospheric correction, it is giving following warning.
Please provide solution. I have tried all the solutions suggested in the previous queries, but no one is working in my case.

please check if SEN2COR_HOME is set correctly as described here:

(the post refers to the PYTON_BIN variable but the same applies for SEN2COR_HOME.)