Oracle Message ORA-15505 - cannot start workload capture because instance string encountered errors while accessing directory string

ERRORcannot start workload capture because instance string encountered errors while accessing directory string
CAUSEGiven instance could not access the specified CAPTURE directory or the specified CAPTURE directory already had a workload capture in it.
ACTIONProvide a directory object that is valid, empty and accessible from all the instances in the database cluster.