If the startup page is a local path, then Konqueror randomly crash and does not access the required path. Steps to reproduce (sorry, I don't have access to the English interface): 1. Configuration -> Configure Konqueror 2. When Konqueror starts, open <Enter a local path, like /tmp> 3. Close Konqueror 4. Restart. Konqueror crash or says that the protocol is not recongnized. Solution: enter <file:///tmp> instead of </tmp>. But why is that? Why "just" giving a local path cannot work? Can't Konqueror tells the difference?
In English: Settings -> Configure Konqueror "When Konqueror starts", "Show my start page", e.g. /tmp/ I just reproduced the bug on Konqueror Version 5.0.97
Error message: KonqFrame(0x55b469769210) QObject(0x0) QUrl("error:/?error=106&errText=#/tmp/") [24051:24350:0429/155418.432573:ERROR:nss_util.cc(727)] After loading Root Certs, loaded==false: NSS error code: -8018 KonqFrame(0x55b46dbeeb50) QObject(0x0) QUrl("about:blank") KDialog(0x55b46e30fb60) CSSCustomDialog(0x55b46de9a190, name = "CSSCustomDialog")