RPM repository missing key

Hello community,

I am trying to install kong but i have a problem with it.

I am trying to add kong RPM Repository from https://download.konghq.com/gateway-2.x-centos-7/repodata/ but the repomd.xml.key is empty file and I get this error:

FAILED! => {“changed”: false, “msg”: “Failure talking to yum: failure: repodata/repomd.xml from gateway-2.x-centos-7: [Errno 256] No more mirrors to try.\nhttps://download.konghq.com/gateway-2.x-centos-7/repodata/repomd.xml: [Errno -1] repomd.xml signature could not be verified for gateway-2.x-centos-7”}

Thanks for the answers