Community repos unavailable

I’m back in opensuse after a year away.
I installed Leap 15.0 from USB. I’m trying to complete and update the installation, but it seems that the community repos don’t work.
Is it true that they are temporarily unavailable or am I doing something wrong?
If further information is needed, please, ask.

prompt# zypper lr -d
Repository priorities are without effect. All enabled repositories share the same priority.

# | Alias            | Name             | Enabled | GPG Check | Refresh | Priority | Type   | URI                                                                                | Service
--+------------------+------------------+---------+-----------+---------+----------+--------+------------------------------------------------------------------------------------+--------
1 | Libdvdcss        | Libdvdcss        | Yes     | ( p) Yes  | Yes     |   99     | rpm-md | http://opensuse-guide.org/repo/openSUSE_Leap_15.0/                                 |        
2 | Main (non-oss)   | Main (non-oss)   | Yes     | ( p) Yes  | Yes     |   99     | rpm-md | http://download.opensuse.org/distribution/leap/15.0/repo/non-oss/                  |        
3 | Main (oss)       | Main             | Yes     | ( p) Yes  | Yes     |   99     | rpm-md | http://download.opensuse.org/distribution/leap/15.0/repo/oss/                      |        
4 | Packman          | Packman          | Yes     | ( p) Yes  | Yes     |   99     | rpm-md | http://packman.inode.at/suse/openSUSE_Leap_15.0/                                   |        
5 | USB              | USB--15.0-1      | No      | ----      | ----    |   99     | rpm-md | hd:///?device=/dev/disk/by-id/usb-IT1170_USB_Flash_Disk_000000001BAF3F89-0:0-part2 |        
6 | Update           | Update           | Yes     | ( p) Yes  | Yes     |   99     | rpm-md | http://download.opensuse.org/update/leap/15.0/oss                                  |        
7 | Update (non-oss) | Update (non-oss) | Yes     | ( p) Yes  | Yes     |   99     | rpm-md | http://download.opensuse.org/update/leap/15.0/non-oss/                             |        
prompt# zypper up
Retrieving repository 'Libdvdcss' metadata ................................................................................................................................................................................[done]
Building repository 'Libdvdcss' cache .....................................................................................................................................................................................[done]
Retrieving repository 'Main (non-oss)' metadata -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------]
Location 'http://download.opensuse.org/distribution/leap/15.0/repo/non-oss/repodata/773c107fe9e932054ad44f31655f245faefbd3172657429e363acf7917e125f0-primary.xml.gz' is temporarily unaccessible.
Abort, retry, ignore? [a/r/i] (r): 
Autoselecting 'r' after 13 seconds. 
Retrieving repository 'Main (non-oss)' metadata ..........................................................................................................................................................................[error]
Repository 'Main (non-oss)' is invalid.
[Main (non-oss)|http://download.opensuse.org/distribution/leap/15.0/repo/non-oss/] Valid metadata not found at specified URL
Please check if the URIs defined for this repository are pointing to a valid repository.
Warning: Skipping repository 'Main (non-oss)' because of the above error.
Retrieving repository 'Main' metadata ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------\]
Location 'http://download.opensuse.org/distribution/leap/15.0/repo/oss/repodata/71f2322fdc7f69beb4cf24e709ca73eba3a2ce7077df1451b579c3e3871de702-primary.xml.gz' is temporarily unaccessible.
Abort, retry, ignore? [a/r/i] (r): 
Autoselecting 'r' after 17 seconds. 
Autoselecting 'r' after 16 seconds. ^C
Trying to exit gracefully...
prompt#

download.opensuse.org is a redirector, its sending you request to a mirror near by you.
Maybe this mirror is broken or updated, so wait or add an mirror in your Repo list.

https://mirrors.opensuse.org/

Very useful answer! Now it’s working normally.
Thank you!

As I said before, this answer was very useful.
Now I have the same problem with the kde repos, but I don’t find the in the mirrors provided in the list.
Where can I find them? In my area download.opensuse.org is still unavailable.
Thank you.

What I mean is that this repo doesn’t work: http://download.opensuse.org/repositories/KDE:/Frameworks5/openSUSE_Leap_15.0
Probably because download.opensuse.org redirects to a mirror in my aera that is unavailable.
I solved that problem for the official repos choosing a mirror fron https://mirrors.opensuse.org/ (in order to avoid the automatic redirection)
I need now a mirror that includes the semi-official repos for kde.
This shouldn’t be difficult, but I didn’t manage to get that information from the web. Can anybody help me?
Thanks!

Use your browser to search on a mirror for your KDE-Framework Repo…

You may also / as well suffer from outdated cached data. Try


zypper clean
zypper ref

Another thing to consider is that not all mirrors serve the entire repo structure. One over here in NL only had the disribution and update repos, for Leap xx.x and Tumbleweed.