Whenever the error message 'invalidcourseid' is used, either via print_error or moodle_exception or get_string, never seems to pass the courseid variable. Even though the string is defined as:

'You are trying to use an invalid course ID: ({$a})'

One way to solve the problem would be to just remove the {$id} from the string, but we actually would like to have the string since we want to have a friendlier error message.

For example,

"The course you are trying access is not located on this server. Please try finding it on our archive server: https://archive.server/course/view.php?id={$a}"

I am submitting a patch to fix all instances of the 'invalidcourseid' to also pass in the courseid.