Cannot update from RedHat repos anymore

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I have a RHEL 7 Developer edition installed and nicely configured. However, I have a requirement for an updated curl/libcurl application I am developing, so I have updated curl from fan-city repository by creating a repo file in yum.repos.d. The curl version now stands at:

curl 7.69.1 (x86_64-redhat-linux-gnu) libcurl/7.69.1 NSS/3.44 zlib/1.2.7 libpsl/0.7.0 (+libicu/50.1.2) libssh2/1.9.0 nghttp2/1.31.1
Release-Date: 2020-03-11
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp 
Features: AsynchDNS GSS-API HTTP2 HTTPS-proxy IPv6 Kerberos Largefile libz Metalink NTLM NTLM_WB PSL SPNEGO SSL UnixSockets

But now I have a problem when I want to update from RedHat repositories:

sudo yum update                                                                                                                                         
Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager
'IdentityCertificate' object has no attribute 'key_path'
https://cdn.redhat.com/content/dist/rhel/server/7/7Server/x86_64/devtools/1/os/repodata/repomd.xml: [Errno 14] curl#35 - "security library failure."
Trying other mirror.
https://cdn.redhat.com/content/dist/rhel/server/7/7Server/x86_64/dotnet/1/os/repodata/repomd.xml: [Errno 14] curl#35 - "security library failure."
Trying other mirror.
https://cdn.redhat.com/content/dist/rhel/server/7/7Server/x86_64/extras/os/repodata/repomd.xml: [Errno 14] curl#35 - "security library failure."
Trying other mirror.
https://cdn.redhat.com/content/dist/rhel/server/7/7Server/x86_64/optional/os/repodata/repomd.xml: [Errno 14] curl#35 - "security library failure."
Trying other mirror.
https://cdn.redhat.com/content/dist/rhel/server/7/7Server/x86_64/os/repodata/repomd.xml: [Errno 14] curl#35 - "security library failure."
Trying other mirror.

It only happnens with RedHat repos, the other repos in the system work fine.

I tried unregistering and re-registering the system but no avail. Is there something I can do, to get my system back?

Thank you.

SD

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