How to fix it?

ORA-04063: %s has errors
 *Cause:  Attempt to execute a stored procedure or use a view that has
          errors.  For stored procedures, the problem could be syntax errors
          or references to other, non-existent procedures.  For views,
          the problem could be a reference in the view's defining query to
          a non-existent table.
          Can also be a table which has references to non-existent or
          inaccessible types.
 *Action: Fix the errors and/or create referenced objects as necessary.