Edit Scanner Preferences is empty

My tasks have taken a long time in gvm 21.04
and I got error messages that “NVT timed out after 320 seconds.”
When I tried to change the config relevant to time out in the scan config part
I realized I have no options, here is the screen of that part
Would you please tell me why and how I can fix it ???

Hello, have you resolved your problem ?
I have same issue with my version: scanner preferences are empty ( but no error messages like NVT timed out)

  • OpenVAS : Version 21.04.0
    • Greenbone Security Assistant 21.04.0~git-218d6fa01-gsa-21.04
    • Greenbone Vulnerability Manager 21.4.0~git-c287c174-gvmd-21.04
    • OpenVAS 21.4.1~git-7d6eff81-openvas-21.04 (gvm-libs: 21.4.1~git-83cf2)
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