Ctrl+U / "Url(s) >> Open" fails

As of my recent upgrade to 20.04 LTS which bumped me to 2.44 keepass2, Ctrl+U normally works.

Expected/previous behaviour: open entry's url in default browser

Actual/current behaviour: modal error widget shows url with message "Cannot find the specified file"

After right-clicking an entry, Url(s) >> Open has the same result, whereas the "Open with Firefox" and "Open with Google Chrome" options both work as expected.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: keepass2 2.44+dfsg-1
ProcVersionSignature: Ubuntu 5.4.0-29.33-generic 5.4.30
Uname: Linux 5.4.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: Unity:Unity7:ubuntu
Date: Thu May 14 22:08:11 2020
EcryptfsInUse: Yes
InstallationDate: Installed on 2018-01-10 (855 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
PackageArchitecture: all
SourcePackage: keepass2
UpgradeStatus: No upgrade log present (probably fresh install)