Oracle Solution for Error ora-19286

Solution for Oracle Error ORA-19286

ORA-19286: XPST0017 - unable to resolve call to function - string

What triggered the Error:

The name and arity of the function call given could not be matched with any in-scope function in the static context.

What should we do to fix it:

x the name of the function or the number of parameters to match the list of in-scope functions.