How to resolve SessionNotCreatedException while working with selenium

These Videos are just for learning purpose, i am creating these videos so that may be in some or other way i can help someone to learn about SDET role and responsibility.

#Selenium
#sendkeys()
#dropdown
#selectcontol
#Automation
#WebElement
#Optiontag
#handledropdowninselenium
#SeleniumAutomation
#seleniumBasics
#exceptions
#SessionNotCreatedException
#SeleniumExceptions