Unable to save the Web Server Memory setting/change on the OneClick Administration page --> Web Server Memory
SPC-OCA-10102: OneClick server restart error: Cannot run program "at": error=2, No such file or directory
Spectrum OneClick in Linux: any version
Missing "at" Linux package
Install the "at" Linux package
Example: yum install at
https://linuxize.com/post/at-command-in-linux/
Workaround: You can manually update two files where the Spectrum OneClick saves the changes.
And restart the Spectrum Tomcat service ($SPECROOT/tomcat/bin/stopTomcat.sh / startTomcat.sh)