Jenkins pipeline nuget restore error


I build my project on github with Jenkins pipeline and then sonarqube reflects the scan result. But I get an error in the pipeline: I run the packages I downloaded from Nuget on the project, but the jenkins pipeline also gives an error.
Error detail;

error NU1101: Unable to find package Microsoft.AspNetCore.Http.Abstractions. No packages exist with this id in source(s): github-xxx [/var/jenkins_home/workspace/xxx-CI/xxx.sln]

Can you be support?