New issue by haunma on void-packages repository

https://github.com/void-linux/void-packages/issues/47932

Description:
### Is this a new report?

Yes

### System Info

Void 6.7.0-rc6_1 x86_64 AuthenticAMD uptodate rFF

### Package(s) Affected

fwupd-1.9.10

### Does a report exist for this bug with the project's home (upstream) and/or another distro?

_No response_

### Expected behaviour

After installing fwupd, it should be possible to check for firmware updates using
`fwupdmgr refresh`
without error.

### Actual behaviour

```
$ sudo fwupdmgr refresh
WARNING: UEFI capsule updates not available or enabled in firmware setup
See https://github.com/fwupd/fwupd/wiki/PluginFlag:capsules-unsupported for more information.
Updating lvfs
Downloading…             [    \                                  ]
(fwupdmgr:2222): Fwupd-CRITICAL **: 16:25:28.943: fwupd_checksum_guess_kind: assertion 'checksum != NULL' failed
Downloading…             [***************************************]
Failed to update metadata for lvfs: signatures were required, but none supplied
```




### Steps to reproduce

As root,
1.  xbps-install fwupd
2.  fwupdmgr refresh