Did you update the project (right-click on the project, "Maven" > "Update project...")? Otherwise, you need to check if pom.xml
contains the necessary slf4j dependencies, e.g.:
org.slf4j
jcl-over-slf4j
1.7.0
runtime
org.slf4j
slf4j-api
1.7.0
runtime
org.slf4j
slf4j-log4j12
1.7.0
runtime
log4j
log4j
1.2.14