Maven Error : Maven Project Configuration for Module isn't available

I keep getting this error when I try to compile my code. I have the pom.xml file in my directories but I am not sure if there is something wrong in there. I found only one link on the internet regarding this and that was not my case: Maven project configuration required for module

Error:Maven Resources Compiler: Maven project configuration required for module 'updater' isn't available. Compilation of Maven projects is supported only if external build is started from an IDE.

Here is the content of my pom file:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0     http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.nothing.updater</groupId>
    <artifactId>Updater</artifactId>
    <version>1.0-SNAPSHOT</version>


    <!--<dependencies>-->
        <!--<dependency>-->
            <!--<groupId>com.nothing.toolbox</groupId>-->
            <!--<artifactId>Toolbox</artifactId>-->
            <!--<version>1.1</version>-->
        <!--</dependency>-->

    <!--</dependencies>-->
</project>

I am using a multi-module project.

Solution 1:

Right-click on pom.xml and then click on "Add as Maven Project".

Solution 2:

Right click the module and select the Make Module "project module name" option from the pop up menu. The messages will be shown. But go to Problems and see now. This will clear and correct this problem.

Solution 3:

In my case the problem ocurred after uprgrading IJ from 14.x to 15.x and disappeared when I issued Build -> Rebuild Project