Disabled update of Repo Gnome software; Understand/correct. Help please

I have inadvertently (I think) disabled the gnome-software update system. See three error messages, one from the package manager and the next two as lines from a dnf update.

First:

Detailed errors from the package manager follow:
failed to resolve package_ids: cannot update repo 'fedora-cisco-openh264': Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried; Last error: Status code: 404 for https://codecs.fedoraproject.org/openh264/36/x86_64/repodata/repomd.xml (IP: 18.159.254.57)

Second:

Running scriptlet: gnome-remote-desktop-42.2-2.fc36.x86_64                                                                                                                                                                            36/54 
  Cleanup          : gnome-remote-desktop-42.2-2.fc36.x86_64                                                                                                                                                                            36/54 
  Running scriptlet: gnome-remote-desktop-42.2-2.fc36.x86_64                                                                                                                                                                            36/54 
Failed to start transient service unit: Connection reset by peerFailed to start transient service unit: Connection reset by peer

Third:

Failed to set unit properties on tracker-xdg-portal-3.service: Transport endpoint is not connected
Failed to set unit properties on gnome-remote-desktop.service: Transport endpoint is not connected

How do I reset the system, please.

Your first error indicates a network issue of some kind where the system is unable to connect to the repo servers.

I just checked and the url you posted is malformed. It should read
https://codecs.fedoraproject.org/openh264/36/x86_64/os/repodata/repomd.xml

The other errors may be related to the same problem.

Many errors can be fixed by a simple reboot. Others take more effort.

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I have followed your link and read the URL. Thanks for that, but I do not understand how to use it.
Had previously tried dnf reinstall gnome -software. That had not helped, and the computer has been rebooted many times since the problem arose. If that is the rebooting you refer tothen it changed nothing.
The link reads – This XML file does not appear to have any style information associated with it. The document tree is shown below.
I am out of my depth here in the shallow end of the pool - any chance of throwing a lifebelt again?

You are not expected to download/read that xml file.

I was simply pointing out that whatever provided that message to you appeared to be looking in the wrong location for that file. Note the path difference in what you posted with the error and what I posted.

If the error repeats then it seems likely there is something wrong with your install.

What version of fedora are you using? The link indicates 36, but you did not say.

You may want to try sudo dnf upgrade --refresh to see if that works, and if not then we may need to dig deeper into the error.

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The problem started after >36 but not immediately. Kind suggestion, sudo dnf upgrade --refreshworked error free, but the software app still failed with — failed to resolve package_ids: cannot update repo ‘fedora-cisco-openh264’: Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried; Last error: Status code: 404 for https://codecs.fedoraproject.org/openh264/36/x86_64/repodata/repomd.xml (IP: 152.19.134.198). I will reboot it next to see if that changes.
The app shows blank pages for apps installed as if it cannot find them, similar with explore except for the title of that page as if detached from the information needed but otherwise functional.
I have curiosty and willingness to work but don`t know how to start. What next?

[quote=“olive wood, post:5, topic:24863, username:woodlands”]
sudo dnf upgrade --refreshworked error free, but the software app still failed with — failed to resolve package_ids: cannot update repo ‘fedora-cisco-openh264’: Cannot download repomd.xml: Cannot download repodata/repomd.xml: All mirrors were tried; Last error: Status code: 404 for https://codecs.fedoraproject.org/openh264/36/x86_64/repodata/repomd.xml (IP: 152.19.134.198). [/quote]

This sounds like a bug in gnome software app since dnf works properly with no errors. Please file a bug at bugzilla.redhat.com for the issue

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Have you tried this sudo pkcon refresh force

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This seems like a useful route, will give it a try. Thank you.

Good suggestion, tried but without any improvement. Thank you

The path part is missing /os/ in between x86_64 and repodata

Posts by yourself, Cinni, and rugk, followed to seemingly positive solution and,
~]$ sudo dnf metalink=https://mirrors.fedoraproject.org/metalink?repo=fedora-cisco-openh264-$releasever&arch=$basearch
#baseurl=https://codecs.fedoraproject.org/openh264/$releasever/$basearch/
[1] 6438
~]$ metalink=https://mirrors.fedoraproject.org/metalink?repo=fedora-cisco-openh264-debug-$releasever&arch=$basearch
#baseurl=https://codecs.fedoraproject.org/openh264/$releasever/$basearch/debug
[2] 6454
[1]+ Stopped sudo dnf metalink=https://mirrors.fedoraproject.org/metalink?repo=fedora-cisco-openh264-$releasever
[2]- Done metalink=https://mirrors.fedoraproject.org/metalink?repo=fedora-cisco-openh264-debug-$releasever
[Olive@Leonard ~]$
But open264 does not appear in dnf repolist.
And after restart still does not update on dnf or on Gnome software Which still shows no apps installed.
Should I have shown a release edition number?
Should I just wait for next update release?