Manually adding Intellij path variables

During installation of Intellij IDEA 2020.2.4 I had an error saying length of path is bigger than 8192 bytes Installer cannot update it when I searched it up and by what error says it simply means that the path simply is too long that new variables cannot be added to it so as the installer had problems updating the path I want to do it manually myself but I dont know what are those so if someone could just tell me what should I or even Installer would have added in the path