This is a web app running on v2.1.6 of CodeIgniter for internal use only - we didn't build it. Recently, one particular endpoint/function to handle a Post is now throwing a 402 (Payment Required) error after working fine for years. Troubleshooting the code, the post-request never hits the function, so believe it's somewhere in a "pre-validation/pre-process" in the stack, but how do I figure that out? Does anyone know the function-path it follows and/or documentation on it? ANY help or guidance is appreciated!
