ORA-28376: cannot find PKCS11 library

 Verify permission for 

cd /opt

find oracle -exec ls -ld {} \;

See if all the directories are owned by root and it takes read to world

If so fix it; by granting 0755 to all the sub directories from /opt/oracle/....

proper permission:

[oracle@vcentos79-oracle-ggtgt ~]$ find /opt/oracle -exec ls -ld {} \;

drwxr-xr-x. 3 root root 20 Sep  6  2024 /opt/oracle

drwxr-xr-x. 3 root root 16 Sep  6  2024 /opt/oracle/extapi

drwxr-xr-x. 3 root root 17 Sep  6  2024 /opt/oracle/extapi/64

drwxr-xr-x. 3 root root 20 Sep  6  2024 /opt/oracle/extapi/64/hsm

drwxr-xr-x. 3 root root 19 Sep  6  2024 /opt/oracle/extapi/64/hsm/oracle

drwxr-xr-x. 2 root root 27 Sep  6  2024 /opt/oracle/extapi/64/hsm/oracle/1.0.0

-rwxr-xr-x. 1 root root 8924633 Sep  6  2024 /opt/oracle/extapi/64/hsm/oracle/1.0.0/liborapkcs.so

[oracle@vcentos79-oracle-ggtgt ~]$