GMP Service is down error message on new install

I am running CentOS 7. I am following this tutorial: 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/": /lib64/ undefined symbol: gnutls_x509_privkey_import
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```

Iā€™m closing this topic as a duplicate of the one below. Please follow up there if you have further questions around this topic.

Nevertheless a short hint:

This is a packaging issue in the 3rdparty repository (not provided / maintained by Greenbone) used in that tutorial. Please contact the package / repository maintainer and report this to get this issue sorted out.