Let's say the Tomcat log has something like this.

java.io.FileNotFoundException: /opt/jws-5.4/tomcat/keystore/keystore.p12 exists, but is not accessible

This is most like an issue with the permissions and ownership of the file/directory. Notice in this example that all of the other directories are owned by jboss whereas the keystore directory is owned by root. Updating the directory to have the expected permissions and ownership will almost always resolve the issue.

~]$ ls -l /opt/jws-5.4/tomcat/
drwxrwxr-x. 1 jboss root 4096 Apr 13  2021 bin
drwxrwxr-x. 1 jboss root   41 Jan  5 02:27 conf
drwxr-xr-x. 3 root  root   26 Jan  5 02:27 keystore
drwxrwxr-x. 1 jboss root 4096 Apr 13  2021 lib
drwxrwxr-x. 1 jboss root    6 Sep 15  2020 logs
drwxrwxr-x. 1 jboss root   72 Nov  5  2020 selinux
drwxrwxr-x. 1 jboss root   71 Nov  5  2020 services
drwxrwxr-x. 1 jboss root    6 Sep 15  2020 temp
lrwxrwxrwx. 1 jboss root   12 Apr 13  2021 webapps -> /deployments