Ah. I apologize. I missed the fact that you are from Webkul.
Code:
ERROR: "Includes\ErrorHandler::FATAL_ERROR" (code 2)
Call to a member function toArray() on null
This is not enough to guess why this may happen. Please check the log files in the var/log/ directory for the full text of the error message including the complete backtrace to the file and the line where it happens.