Can't login on web interface

Hi, i just finished unistalling gvm in a ubuntu machine, but when I try to login it pops the message:

“The Greenbone Vulnerability Manager service is not responding. This could be due to system maintenance. Please try again later, check the system status, or contact your system administrator.”

After trying to debug the problem I can see the following message while trying to restart gvm:

jul 28 20:07:10 sr-opensec-2 systemd[1]: gvmd.service: Can’t open PID file /opt/gvm/var/run/ (yet?) after start: Operation not permitted

Any hints on how to solve this?

GVM versions

gsad: Greenbone Security Assistant 21.4.1~dev1
gvmd: GIT revision 134e8fe8-gvmd-21.04
Manager DB revision 242
Copyright © 2009-2021 Greenbone Networks GmbH
License: AGPL-3.0-or-later
openvas-scanner: OpenVAS 21.4.2~dev1~git-0534359a-openvas-21.04
GIT revision ~git-0534359a-openvas-21.04
**gvm-libs:**gvm-libs 21.4.2~dev1~git-1432184-gvm-libs-21.04


**Operating system:**Ubuntu 20.04
Kernel: 5.8.0-43-generic #49~20.04.1-Ubuntu
Installation method / source: Source

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