In the context of computer programming, what is the significance of the error message "required context class hudson.filepath is missing"?
a) It indicates a missing configuration file needed for network security protocols.
b) It signifies that a required class for handling file paths in a Hudson (Jenkins) build environment is not available.
c) It shows that a class for managing user permissions in a database is not found.
d) It implies that a required library for graphical user interface components is missing.