waiting for u to discuss with

She is waiting for you to discuss the employee's problem.

You should leave out "with you" for clarity.
"Discuss" is a transitive verb that should be followed by the object "the employee's problem".

CORRECT ---> transitive verb + object
WRONG ------> transitive verb + preposition (e.g. for) + object



In conclusion,

WRONG: She is waiting for you to discuss (with you) for the employee's problem.
CORRECT: She is waiting for you to discuss (with you) the employee's problem.

或者是 : She is waiting for you

together to discuss the problem of employees.

應該是
She is waiting for you to discuss the employee's problem.