I submitted the following code which executed successfully, but on checking the challenge I keep getting the message that it is not complete:

public class StringArrayTest {
    public static List<String> generateStringArray(Integer numberOfItems){
        List<String> strResult = new List<String>();
        for(Integer i = 0;i < numberOfItems;i++) {
            strResult.add('Test '+ (i+1));
            System.debug(strResult[i]);
        }
        return strResult;
    }
}

Can someone please help me with this

Hi all,
I have an issue when I come to open my developer console. It opens and start to load but it quickly minimizes, showing a "loading..." text.
After that, the developer console's window freezes completely, allowing me only to close it. Same happens to the window I used to open the developer console. 
I find a solution here http://salesforce.stackexchange.com/questions/80453/developer-console-is-not-loading but I don't have enough time to switch my workspace.
I tried cleaning the browser data but nothing changed. I can also use the developer console of other salesforce accounts, so it seems it only happens with my account.

And I have another issue, I don't know if it's related or not, I'm posting it here just in case it is and it helps to see the problem.
As I couln't continue using the default developer console, I downloaded Welkin Suite, but when I build the solution, I keep getting an error that says "file has pending server changes. Please pull first", which it doesn't fix after a pull. When I'm not getting that error I get strage errors like "The attribute “(...)” was not found on the COMPONENT markup://(...): Origin"

Thanks in advance to anyone who can help me solving this!