I’m trying to migrate my project from Vaadin 7.1.0 to Vaadin 8.26.0 but I’m getting error

[ERROR] Failed to execute goal com.vaadin:vaadin-maven-plugin:8.26.0:upgrade8 (default-cli) on project quicktickets-dashboard: Problem migrating the project: Command [[
[ERROR] C:Program FilesJavajdk1.8.0_361jrebinjava -Xmx2048M -Xss1024k com.vaadin.framework8.migrate.Migrate -version=8.26.0
[ERROR] ]] failed with status 1
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal com.vaadin:vaadin-maven-plugin:8.26.0:upgrade8 (default-cli) on project quicktickets-dashboard: Problem migrating the
 project
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2 (MojoExecutor.java:333)
    at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute (MojoExecutor.java:316)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:212)

I try adding        `<dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.32</version>
        </dependency>'
`
to pom.xml but didn't work. Can please somone help me with this.