diff --git a/flow-plugins/flow-dev-bundle-plugin/src/main/java/com/vaadin/flow/plugin/maven/BuildDevBundleMojo.java b/flow-plugins/flow-dev-bundle-plugin/src/main/java/com/vaadin/flow/plugin/maven/BuildDevBundleMojo.java
index ec316ae005d..decfe0b3ada 100644
--- a/flow-plugins/flow-dev-bundle-plugin/src/main/java/com/vaadin/flow/plugin/maven/BuildDevBundleMojo.java
+++ b/flow-plugins/flow-dev-bundle-plugin/src/main/java/com/vaadin/flow/plugin/maven/BuildDevBundleMojo.java
@@ -30,13 +30,11 @@
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
-import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.Predicate;
 import java.util.stream.Collectors;
@@ -53,9 +51,6 @@
 import org.apache.maven.plugins.annotations.Mojo;
 import org.apache.maven.plugins.annotations.Parameter;
 import org.apache.maven.plugins.annotations.ResolutionScope;
-import org.apache.maven.artifact.Artifact;
-import org.apache.maven.artifact.DependencyResolutionRequiredException;
-import org.apache.maven.plugin.AbstractMojo;
 import org.apache.maven.project.MavenProject;
 import org.codehaus.plexus.classworlds.realm.ClassRealm;
 import org.codehaus.plexus.classworlds.realm.NoSuchRealmException;
@@ -75,9 +70,6 @@
 import com.vaadin.flow.server.Constants;
 import com.vaadin.flow.server.ExecutionFailedException;
 import com.vaadin.flow.server.frontend.FrontendUtils;
-import com.vaadin.flow.server.frontend.installer.NodeInstaller;
-import com.vaadin.flow.server.frontend.installer.Platform;
-import com.vaadin.flow.server.frontend.scanner.ClassFinder;
 import com.vaadin.flow.server.scanner.ReflectionsClassFinder;
 import com.vaadin.flow.theme.Theme;
 import com.vaadin.flow.utils.FlowFileUtils;
@@ -611,7 +603,8 @@ private void checkFlowCompatibility(PluginDescriptor pluginDescriptor) {
         String pluginFlowVersion = pluginDescriptor.getArtifacts().stream()
                 .filter(isFlowServer).map(Artifact::getVersion).findFirst()
                 .orElse(null);
-        if (!Objects.equals(projectFlowVersion, pluginFlowVersion)) {
+        if (projectFlowVersion != null
+            && !Objects.equals(projectFlowVersion, pluginFlowVersion)) {
             getLog().warn(
                     "Vaadin Flow used in project does not match the version expected by the Vaadin plugin. "
                             + "Flow version for project is "
diff --git a/flow-plugins/flow-maven-plugin/src/main/java/com/vaadin/flow/plugin/maven/FlowModeAbstractMojo.java b/flow-plugins/flow-maven-plugin/src/main/java/com/vaadin/flow/plugin/maven/FlowModeAbstractMojo.java
index dd068aeba84..0bdbbc6e4d5 100644
--- a/flow-plugins/flow-maven-plugin/src/main/java/com/vaadin/flow/plugin/maven/FlowModeAbstractMojo.java
+++ b/flow-plugins/flow-maven-plugin/src/main/java/com/vaadin/flow/plugin/maven/FlowModeAbstractMojo.java
@@ -28,7 +28,6 @@
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URLClassLoader;
-import java.nio.charset.StandardCharsets;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.List;
@@ -56,7 +55,6 @@
 import com.vaadin.flow.plugin.base.BuildFrontendUtil;
 import com.vaadin.flow.plugin.base.PluginAdapterBase;
 import com.vaadin.flow.server.Constants;
-import com.vaadin.flow.server.ExecutionFailedException;
 import com.vaadin.flow.server.InitParameters;
 import com.vaadin.flow.server.frontend.FrontendTools;
 import com.vaadin.flow.server.frontend.FrontendUtils;
@@ -665,7 +663,8 @@ private void checkFlowCompatibility(PluginDescriptor pluginDescriptor) {
         String pluginFlowVersion = pluginDescriptor.getArtifacts().stream()
                 .filter(isFlowServer).map(Artifact::getBaseVersion).findFirst()
                 .orElse(null);
-        if (!Objects.equals(projectFlowVersion, pluginFlowVersion)) {
+        if (projectFlowVersion != null
+            && !Objects.equals(projectFlowVersion, pluginFlowVersion)) {
             getLog().warn(
                     "Vaadin Flow used in project does not match the version expected by the Vaadin plugin. "
                             + "Flow version for project is "