I configured a maven settings and global settings file in the Pipeline Maven Configuration of the folder containing the multibranch pipeline job.  When I run the following stage from my Jenkins file:

stage('Package') { 
 steps {
  withMaven()  { 
   bat "mvn clean package"
  }
 }
}

I get this error:

[ERROR] Error executing Maven. [ERROR] The specified user settings file does not exist: C:\jenkins\dctl\branchespackageFspring-boot\workspace@tmp\withMaven22e2d518\settings.xml

The reason I get this error is that the folder containing the branch is called branches%2Fspring-boot and the config file provider is replacing %2 with package (I assume this is because package is the second argument to the script that is invoked)