ERROR: Directory 'C:/Users/User/MyMavenApp/target/site/jacoco' exists but failed copying to 'C:\ProgramData\Jenkins\.jenkins\jobs\MyMavenApp\builds\76\htmlreports\JaCoCo_20Coverage_20Report'

ERROR: Directory ‘C:/Users/User/MyMavenApp/target/site/jacoco’ exists but failed copying to ‘C:\ProgramData\Jenkins.jenkins\jobs\MyMavenApp\builds\76\htmlreports\JaCoCo_20Coverage_20Report’.
for some reasons i do not know, its failing to copy the coverage reports to my destination directory

You really want to copy files to the users home directory from a Jenkins job?
Is the Jenkins agent process (if you use an agent) running as the user to which you want to copy?