I face with that error message while I was making 12c installation on Solaris machine. The Screen shoot is:

After click OK button, installation finishes without any error message. But while You are checking component from dba_registery APEX & CATJAVA are in INVALID status:

If you dig more than We will see SYS.KU$_RADM_FPTM_VIEW is in the invalid state.

SQL> show errors view SYS.KU$_RADM_FPTM_VIEW
Errors for VIEW SYS.KU$_RADM_FPTM_VIEW:

LINE  /COL ERROR
——– —————————————————————–
0/0     ORA-00932: inconsistent datatypes: expected NCHAR got NCHAR

So how We can make it valid? Here are the steps:

1. alter type ku$_radm_fptm_t compile reuse settings;
2. alter view KU$_RADM_FPTM_VIEW compile;
3. Run utlrp from sqlplus.Its located under $ORACLE_HOME/rdbms/admin pat

Reference:
Failed To Export MGMTDB Due To Invalid Object KU$_RADM_FPTM_VIEW in 12c (Doc ID 1641033.1)