How to install check_mk agent on SLES 15

while installing the xinetd service, received below error
Problem retrieving the repository index file for service ‘xinetd’:
Download (curl) error for ‘https://software.opensuse.org/ymp/network:utilities/SLE_15/xinetd.ymp/repo/repoindex.xml?cookies=0’:
Error code: HTTP response: 400
Error message: The requested URL returned error: 400 Bad Request