Tasks finish with an early Error

Hi all,
I have some trouble with scanning tasks. Every task finished immediately after start with the an Error:

When I checked the logs, there is an error msg in openvassd.log


sd main:MESSAGE:2020-02-27 10h22.20 utc:37380: Plugin 2008/secpod_openfire_secbypass_900401.nasl is deprecated. It will neither be loaded nor launched.
sd main:MESSAGE:2020-02-27 10h22.20 utc:37380: Plugin 2010/gb_open_urgence_vaccin_mult_lfi_vuln.nasl is deprecated. It will neither be loaded nor launched.
sd main:MESSAGE:2020-02-27 10h22.20 utc:37380: Plugin 2014/gb_oracle_opensso_mult_xss_vuln.nasl is deprecated. It will neither be loaded nor launched.
sd main:MESSAGE:2020-02-27 10h22.20 utc:37380: Plugin 2010/gb_php_inventory_mult_vuln.nasl is deprecated. It will neither be loaded nor launched.
sd main:MESSAGE:2020-02-27 10h22.20 utc:37380: The NVT with oid 1.3.6.1.4.1.25623.1.0.1 has no category assigned. This is considered a fatal error, since the NVTI Cache structure stored in Redis is out dated or corrupted.
sd main:MESSAGE:2020-02-27 10h22.20 utc:37380: Couldn’t initialize the plugin scheduler

GVM versions

gsa: Greenbone Security Assistant 8.0.1
gvm: Greenbone Vulnerability Manager 8.0.1
openvas-scanner: OpenVAS Scanner 6.0.1
gvm-libs: 10.0.1

Environment

Operating system: Ubuntu 18.04.4 LTS
Kernel: Linux mch 4.15.0-66-generic #75-Ubuntu SMP Tue Oct 1 05:24:09 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Thanks in advance guys.