You are seeing the following error in the console window:
error CS0103: The name `____' does not exist in the current context
CS0103 is caused when you are using a name for a variable or method that does not exist within the context that you are using it.
Error displayed in this example:
error CS0103: The name `displayFirstName' does not exist in the current
In order to fix the CS0103 error you will need to correct the name of the variable or method from where it is declared or referenced.