Unity is throwing an error but I dont know what's wrong with my code

[lapis sand]

in the if statement type panelOn == false

or replace it with !panelOn

! before a bool means its the opposite

[velvet field]

For explanation:
= is an assignment operator.
== is a comparison operator.

Note that misusing the assignment operator inside an if condition may not always cause a compiler error, as assignments return the value that was assigned.