Bug 451480

Summary:	Opening Page of Konqueror always reports "Undocumented error... Unknown error code N"
Product:	[Applications] konqueror	Reporter:	Phil <pv.bugzilla>
Component:	general	Assignee:	Konqueror Developers <konq-bugs>
Status:	REPORTED ---
Severity:	normal	CC:	stefano.crocco
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Debian stable
OS:	Linux
Latest Commit:		Version Fixed In:
Sentry Crash Report:

Description Phil 2022-03-14 07:14:03 UTC

SUMMARY: Every time a new Konqueror instance is started, the page gives the error message below.

ERROR MESSAGE:
"The requested operation could not be completed
Undocumented Error
Details of the Request:
URL:
Date and Time: Monday, March 14, 2022 2:54:24 PM HKT
Additional Information:
Description:
Unknown error code -1,582,691,072 Please send a full bug report at https://bugs.kde.org.

I note that others have reported online with different error codes; I believe mine has changed over time.
example: https://www.reddit.com/r/kde/comments/s68gex/konqueror_is_this_an_inside_joke/
"I've tried it on Debian, Ubuntu, Kubuntu and Fedora and most recently on a Raspberry Pi (using the R-Pi OS). On a fresh install, I click the browser button and get a screen with ..."

SYSTEM: OS: Debian 11.1 and 11.2
Konqueror Version 20.12.0
KDE Frameworks 5.78.0
Qt 5.15.2 (built against 5.15.2)
The xcb windowing system

ADDITIONAL INFORMATION
Changing Settings: Configure Konqueror : When Konqueror starts options : all result in errors.
Neither the Start Page nor the Home page seems to be working.
However after this, konqueror seems to behave normally.
Changing "default web browser engine" from "WebEngine" to "KHTML" gives a different error:

ERROR MESSAGE TWO:
The requested operation could not be completed
Cannot Initiate the error Protocol
Technical Reason: Unable to Create io-slave

Details of the Request:
URL: error:/?error=105&amp;errText=
Protocol: error
Date and Time: Monday, March 14, 2022 3:10:19 PM HKT
Additional Information: klauncher said: Unknown protocol 'error'.
Description:
The io-slave which provides access to the error protocol could not be started. This is usually due to technical reasons.
Possible Causes:
klauncher could not find or start the plugin which provides the protocol.This means you may have an outdated version of the plugin.
Possible Solutions:
Update your software to the latest version. Your distribution should provide tools to update your software.
Contact your appropriate computer support system, whether the system administrator, or technical support group for further assistance.

Comment 1 Phil 2022-03-14 07:24:59 UTC

This google search will identify many similar reports. 
https://www.google.com/search?q=konqueror+Undocumented+Error+Unknown+error+code&gl=us

This has been reported before, at least in 2021-08-08:
https://bugs.kde.org/show_bug.cgi?id=440725 

This error message may discourage new users from using konqueror.
konqueror is a great tool, relatively lightweight, fast, and highly functional, merging filesystem browsing and webbrowsing; I hope it will be maintained.

Comment 2 Stefano Crocco 2022-03-14 18:37:45 UTC

What have you selected in the "When Konqueror starts" field in the General page of Konqueror configuration dialog? If you have set "Show my start page", have you also filled the field on its right? Bug #449874 described a similar issue and we found out that it was caused by choosing to use a custom start page but leaving it empty. Note that setting the Home page has no effect here (the home page is the page you go when you press the Home button on the toolbar).