Bug 53176 – Firefox: After an upgrade from UCS4 to UCS5 tabs are empty

Bug 53176 - Firefox: After an upgrade from UCS4 to UCS5 tabs are empty


Summary:	Firefox: After an upgrade from UCS4 to UCS5 tabs are empty

Status:	NEEDMOREINFO

Product:	UCS
Classification:	Unclassified
Component:	UMC - Software update
Version:	UCS 5.0
Hardware:	Other Linux

Importance:	P5 normal (vote)
Target Milestone:	---
Assigned To:	UMC maintainers
QA Contact:	UMC maintainers

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Blocks:
	Show dependency tree / graph

Reported:	2021-04-27 17:21 CEST by Max Pohle
Modified:	2021-05-04 13:30 CEST (History)
CC List:	2 users (show)

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Attachments
missing file after the update (30.13 KB, image/png) 2021-04-27 17:21 CEST, Max Pohle	Details
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Description Max Pohle

2021-04-27 17:21:27 CEST

Created attachment 10705 [details]
missing file after the update

= Steps to reproduce

Update UCS4 to UCS5, then log in as Administrator (or reboot and log in), then click on "Computers". The page never loads in Firefox 88.0, but in chromium it works.


= Possible solution

I have investigated just a little with and found a few error messages in the Javascript console. I found, that the following error message appeared a few times:

> The ressource from "<url>' was blocked due to MIME type ("text/html") mismatch (X-Content-Type-Options: nosniff).

And I checked its url manually. It turnes out, that there is a 404 hidden behind it, which is delivered by the apache server in a HTML page of content type text/html. One of these URLs was called `js/umc/dialog/NotificationDropDownButton.js`, which I copied from a UCS4 system into the folder `/usr/share/univention-web/js/umc/dialog/` on my UCS5, where it was missing (see screenshot) and doing so fixed the problem for me.

Comment 1 Ingo Steuwer

2021-04-28 11:53:06 CEST

Johannes, is this a caching issue? Do we need a fix for UCS 5.0?

Comment 2 Johannes Keiser

2021-04-29 11:19:07 CEST

I could not reproduce this.

Could be a caching issue but the the UMC and portal shouldn't even
open in the first place, if they were visited before the upgrade, due
to caching issues.