Software properties is stuck "Refreshing cache" in an infinite loop whenever I attempt to reload the cache while my PC is disconnected from the internet

[Seija K.]

When I attempted to change the Software & Updates settings by clicking on the "prerelease" version, I realized I forgot to connect to the internet.

I did, but not before clicking the "Reload" button on the desktop.

As a result, even after my PC connected to the internet, now the Cache Refresh is stuck at 100% completion, instead of finishing, or closing after giving me an error.

Description: Ubuntu Focal Fossa (development branch)
Release: 20.04

software-properties-gtk:
  Installed: 0.98.7
  Candidate: 0.98.7
  Version table:
 *** 0.98.7 500
        500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages
        100 /var/lib/dpkg/status

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: software-properties-gtk 0.98.7
ProcVersionSignature: Ubuntu 5.4.0-21.25-generic 5.4.27
Uname: Linux 5.4.0-21-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu21
Architecture: amd64
CasperVersion: 1.442
Date: Fri Apr 3 18:14:03 2020
LiveMediaBuild: Ubuntu 20.04 LTS "Focal Fossa" - Beta amd64 (20200401)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=C.UTF-8
 SHELL=/bin/bash
SourcePackage: software-properties
UpgradeStatus: No upgrade log present (probably fresh install)