go to post Hao Ma · Jan 30 I have come across issue when I install iris 2023.1 on redhat 8. the oldest version which is supported by 2023.1 is 8.6, if redhat release is 8.5 or older, the installed failed and give some error message. I forgot what was loged in install.log. I remembered I fixed it by modified a openssl setting in requirement check file.