Eclipse exception 'tools.vaadin.com'

I have a multi-module maven project using Vaadin 7.5.8.
The following alert box is presented:

In ${ECLIPSE_WORKSPACE}/.metadata/.log:

!ENTRY com.vaadin.integration.eclipse 2 0 2015-10-27 02:19:26.907 !MESSAGE Could not check Vaadin version in project viki-common !STACK 1 org.eclipse.core.runtime.CoreException: Unable to find WEB-INF/lib folder. Ensure the project is a dynamic web project. at com.vaadin.integration.eclipse.util.ErrorUtil.newCoreException(ErrorUtil.java:141) at com.vaadin.integration.eclipse.util.ProjectUtil.getWebInfLibFolder(ProjectUtil.java:110) at com.vaadin.integration.eclipse.util.ProjectUtil.getVaadinLibraryInProject(ProjectUtil.java:376) at com.vaadin.integration.eclipse.util.ProjectUtil.getVaadinLibraryVersion(ProjectUtil.java:351) at com.vaadin.integration.eclipse.background.CheckVaadinVersionsJob.getVaadinProjects(CheckVaadinVersionsJob.java:100) at com.vaadin.integration.eclipse.background.CheckVaadinVersionsJob.run(CheckVaadinVersionsJob.java:63) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) !SUBENTRY 1 com.vaadin.integration.eclipse 4 0 2015-10-27 02:19:26.907 !MESSAGE Unable to find WEB-INF/lib folder. Ensure the project is a dynamic web project. The interesting thing is that the project mentioned is closed at the time.

Looks like that has been reported in the following ticket
https://dev.vaadin.com/ticket/18962

Thanks John