I can’t reproduce.
The first 2 error lines are cropped, I think there’s more info about the error.
Usually a malformed/duplicate signature won’t stop the rules update and seems a minor issue, see this thread.
The SC_WARN_FLOWBIT warning shouldn’t be an issue, see here and here.
Did you already try to disable and reenable the malware category in the server manager?
Please share your config:
config show suricata