"I'm sorry to hear that the suggested solutions haven't worked for you. It's worth noting that CentOS 7 has reached its end-of-life, but there is still an option for extended lifecycle support through Tuxcare."
Checking the website tuxcare.com might be a good idea to see if they have any information or solutions that could help you with this issue. I hope you're able to find a solution soon and get your system back up and running smoothly.