Windows Server 2012 R2 Security Monthly Quality Rollup Installation Problem

Job ID: 32072119

Budget: €8 – €30 EUR

Hello friends,
yes as the title says we have problems with the installation of windows updates.
Unfortunately we can not install the monthly security updates for windows server.
It shows that it is installed and after a restart the update is there again.
If you hide the update, you are offered the previous security update from the last month.
I could now go back to 2019 and unfortunately do not know more.
I hope you can help me solve the problem.
Thank you.