Oracle Message PLS-00542 - CLOB and NCLOB cannot use varying-width character sets in the server

ERRORCLOB and NCLOB cannot use varying-width character sets in the server
CAUSEA server type is being created with an embedded CLOB or NCLOB atttribute which uses a varying-width character set.
ACTIONUse VARCHAR2 instead of CLOB, or use a fixed-width character set.