Can't search in Dolphin

[Sherif]

If I click Find, write something in the textbox then click enter, while in the root directory, I get error: "Invalid protocol". See Snapshot1.png.
If search (Using the steps above), while in home directory, I don't get anything.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: dolphin 4:14.12.3-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
Uname: Linux 3.19.0-9-generic x86_64
ApportVersion: 2.16.2-0ubuntu3
Architecture: amd64
CurrentDesktop: KDE
Date: Mon Mar 16 23:41:28 2015
InstallationDate: Installed on 2015-03-04 (12 days ago)
InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150224.1)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: kde-baseapps
UpgradeStatus: No upgrade log present (probably fresh install)

[Munawar Ahmed (munawar-ahmed)]

This bug also affects me in identical manner!

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[a1 (2093962-c)]

I experience this bug in version 4:15.04.1 as well.