When clicking the url link in keepass the web browser fails to open and the response is an error message "cannot find requested file". This still works correctly with Keepass 2.38 in Bionic.

Opening the web browser on clicking the url link associated with the keepass entry has always been standard functionality in Keepass, and certainly works with Keepass 2.38 on Bionic.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: keepass2 2.44+dfsg-1
ProcVersionSignature: Ubuntu 5.4.0-42.46-generic 5.4.44
Uname: Linux 5.4.0-42-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.6
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Wed Aug 12 14:17:38 2020
InstallationDate: Installed on 2020-06-13 (60 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_AU:en
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_AU.UTF-8
 SHELL=/bin/bash
SourcePackage: keepass2
UpgradeStatus: No upgrade log present (probably fresh install)