I have:
srwx------ 1 www-data www-data 0 Feb 19 23:33 S.gpg-agent
srwx------ 1 www-data www-data 0 Feb 19 23:33 S.gpg-agent.browser
srwx------ 1 www-data www-data 0 Feb 19 23:33 S.gpg-agent.extra
srwx------ 1 www-data www-data 0 Feb 19 23:33 S.gpg-agent.ssh
drwx------ 2 www-data www-data 4096 Feb 19 22:12 openpgp-revocs.d
drwx------ 2 www-data www-data 4096 Feb 19 23:33 private-keys-v1.d
-rw-r--r-- 1 root root 4209 Feb 25 13:24 pubring.kbx
-rw------- 1 www-data www-data 6137 Feb 19 23:33 pubring.kbx~
-rw------- 1 www-data www-data 600 Feb 19 22:28 random_seed
-rw-r----- 1 root root 676 Feb 19 23:33 sshcontrol
-rw------- 1 www-data www-data 1440 Feb 19 23:33 trustdb.gpg
Searching your error online:
gpg: error building skey array: Permission denied
It seems you may need to use a --batch flag when importing your keys