greenbone-security-assistant.service: Failed with result 'exit-code'.

gvm-check-setup 1.0.0
  Test completeness and readiness of GVM-11
Step 1: Checking OpenVAS (Scanner)...
        OK: OpenVAS Scanner is present in version 7.0.1.
        OK: Server CA Certificate is present as /var/lib/gvm/CA/servercert.pem.
Checking permissions of /var/lib/openvas/gnupg/*
        OK: _gvm owns all files in /var/lib/openvas/gnupg
        OK: redis-server is present.
        OK: scanner (db_address setting) is configured properly using the redis-server socket: /var/run/redis-openvas/redis-server.sock
        OK: redis-server is running and listening on socket: /var/run/redis-openvas/redis-server.sock.
        OK: redis-server configuration is OK and redis-server is running.
        OK: _gvm owns all files in /var/lib/openvas/plugins
        OK: NVT collection in /var/lib/openvas/plugins contains 61819 NVTs.
Checking that the obsolete redis database has been removed
        OK: No old Redis DB
        OK: OpenVAS Scanner is present in version 1.0.1.
Step 2: Checking GVMD Manager ...
        OK: GVM Manager (gvmd) is present in version 9.0.1.
Step 3: Checking Certificates ...
        OK: GVM client certificate is valid and present as /var/lib/gvm/CA/clientcert.pem.
        OK: Your GVM certificate infrastructure passed validation.
Step 4: Checking data ...
        OK: SCAP data found in /var/lib/gvm/scap-data.
        OK: CERT data found in /var/lib/gvm/cert-data.
Step 5: Checking Postgresql DB and user ...
        OK: Postgresql version and default port are OK.
could not change directory to "/root": Permission denied
 gvmd      | _gvm     | UTF8     | en_US.UTF-8 | en_US.UTF-8 |
        OK: At least one user exists.
Step 6: Checking Greenbone Security Assistant (GSA) ...
Oops, secure memory pool already initialized
        OK: Greenbone Security Assistant is present in version 9.0.1.
Step 7: Checking if GVM services are up and running ...
        Starting ospd-openvas service
        Waiting for ospd-openvas service
        OK: ospd-openvas service is active.
        Starting gvmd service
        Waiting for gvmd service
        OK: gvmd service is active.
        Starting greenbone-security-assistant service
        Waiting for greenbone-security-assistant service
        OK: greenbone-security-assistant service is active.
Step 8: Checking GVM database ...
could not change directory to "/root": Permission denied
        OK: portnames are in database.
Step 9: Checking few other requirements...
        OK: nmap is present in version 9.0.1.
        OK: ssh-keygen found, LSC credential generation for GNU/Linux targets is likely to work.
        OK: nsis found, LSC credential package generation for Microsoft Windows targets is likely to work.
        OK: xsltproc found.
        OK: The password policy file at /etc/gvm/pwpolicy.conf contains entries.

It seems like your GVM-11 installation is OK.