I am running CentOS 7. I am following this tutorial: https://linuxincluded.com/installing-openvas-on-centos-7/. From gvmd.log:
md manage:WARNING:2020-11-10 12h24.57 utc:4303: sqlv: sql_exec_internal failed
md main:MESSAGE:2020-11-10 12h24.57 utc:4305: Greenbone Vulnerability Manager version 9.0.0 (DB revision 221)
md manage: INFO:2020-11-10 12h24.57 utc:4305: Modifying user password.
md manage:WARNING:2020-11-10 12h24.57 utc:4305: sql_exec_internal: PQexec failed: ERROR: could not load library "/usr/lib64/libgvm-pg-server.so": /lib64/libgvm_util.so.11: undefined symbol: gnutls_x509_privkey_import
(7)
md manage:WARNING:2020-11-10 12h24.57 utc:4305: sql_exec_internal: SQL: CREATE OR REPLACE FUNCTION hosts_contains (text, text) RETURNS boolean AS '/usr/lib64/libgvm-pg-server', 'sql_hosts_contains' LANGUAGE C IMMUTABLE;
md manage:WARNING:2020-11-10 12h24.57 utc:4305: sqlv: sql_exec_internal failed```