Update error - gpg: invalid key resource URL

[icedigger]

I am getting this message when I try and update.

Reading package lists... Done
Building dependency tree     
Reading state information... Done
The following packages will be upgraded:
  lite-welcome
1 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
1 not fully installed or removed.
Need to get 0 B/627 kB of archives.
After this operation, 0 B of additional disk space will be used.
Setting up lite-software (5.0-0030-linuxlite) ...
  % Total    % Received % Xferd  Average Speed  Time    Time    Time  Current
                                Dload  Upload  Total  Spent    Left  Speed
100  1743  100  1743    0    0  21787      0 --:--:-- --:--:-- --:--:-- 21787
gpg: invalid key resource URL '/tmp/apt-key-gpghome.xIpN5ouIj8/hometevenpusser
.asc.gpg'
gpg: keyblock resource '(null)': General error
gpg: key 0FAD31CA8719FCE4: 1 signature not checked due to a missing key
gpg: key 3B4FE6ACC0B21F32: 3 signatures not checked due to missing keys
gpg: key D94AA3F0EFE21092: 3 signatures not checked due to missing keys
gpg: key 871920D1991BC93C: 1 signature not checked due to a missing key
gpg: Total number processed: 6
gpg:      skipped new keys: 6
dpkg: error processing package lite-software (--configure):
installed lite-software package post-installation script subprocess returned er
ror exit status 1
Errors were encountered while processing:
lite-software
E: Sub-process /usr/bin/dpkg returned an error code (1)