Provisioning: gcc7 installation fails on openSUSE - not installable providers

+ sudo zypper -nq install git gcc7 gcc7-c++
Repository 'Main Update Repository' is invalid.
[repo-update|http://download.opensuse.org/update/leap/15.1/oss] Valid metadata not found at specified URL
Warning: Skipping repository 'Main Update Repository' because of the above error.
Some of the repositories have not been refreshed because of an error.
Problem: gcc7-7.4.0+r266845-lp151.1.35.x86_64 requires cpp7 = 7.4.0+r266845-lp151.1.35, but this requirement cannot be provided
 not installable providers: cpp7-7.4.0+r266845-lp151.1.35.x86_64[repo-oss]
 Solution 1: Following actions will be done:
 do not install gcc7-7.4.0+r266845-lp151.1.35.x86_64
 do not install gcc7-c++-7.4.0+r266845-lp151.1.35.x86_64
 Solution 2: downgrade of cpp7-7.5.0+r278197-lp151.2.9.1.x86_64 to cpp7-7.4.0+r266845-lp151.1.35.x86_64
 Solution 3: break gcc7-7.4.0+r266845-lp151.1.35.x86_64 by ignoring some of its dependencies
Choose from above solutions by number or cancel [1/2/3/c/d/?] (c): c
agent:2020/06/11 05:07:22 build.go:529: Executing scheduled instruction 1 of 1 - Upload all core dumps if there are some
agent:2020/06/11 05:07:22 build.go:437: Skip uploading core files because CORE_FILES_PATH is not set in the environment
agent:2020/06/11 05:07:22 build.go:534: 
agent:2020/06/11 05:07:22 agent.go:272: Provision failed
agent:2020/06/11 05:07:22 agent.go:202: ERROR building: Provisioning failed: Error running bash script "/tmp/provisioning-499662326/coin/provisioning/qtci-linux-openSUSE-15.1-x86_64/02-zypperpackages.sh": Error running bash -ex /tmp/provisioning-499662326/coin/provisioning/qtci-linux-openSUSE-15.1-x86_64/02-zypperpackages.sh: exit status 4
INFO:workitem.py:611(34025): Agent FINISHED FAIL: <could not determine failure location - check log: /mnt/coin-storage-01/ci-working-dir/storage/provisioning/qtci-linux-openSUSE-15.1-x86_64-d0cd38/provision_1591851533/log.txt.gz>: provisioning/qtci-linux-openSUSE-15.1-x86_64-d0cd38/Provision