PhantomJSDriver found element, but still undefined

I have a strange problem with PhantomJSDriver and Java,
I am trying to click on a link like this:

WebElement loginButton =  wait.until(
                ExpectedConditions.elementToBeClickable(By.xpath("//a[@ui-sref='login']"))
                );
        LOG.debug("Login Button Found :  ["+loginButton.getAttribute("href")+"]" );
        loginButton.click();

      

        
        
        
      

    

With Crome Driver I have no problem, but with phantomsJS (2.0.0 (or 1.9.7 / 1.9.8) and GhostDriver 1.2.0 I have this error:

[DEBUG - 2015-05-04T09:46:03.610Z] WebElementLocator - _handleLocateCommand - Element(s) Search Start Time: 1430732763610
[DEBUG - 2015-05-04T09:46:03.612Z] WebElementLocator - _find.locator - {"using":"xpath","value":"//a[@ui-sref='login']"}
[DEBUG - 2015-05-04T09:46:03.624Z] WebElementLocator - _locateElement.locator - {"using":"xpath","value":"//a[@ui-sref='login']"}
[DEBUG - 2015-05-04T09:46:03.624Z] WebElementLocator - _locateElement.findElementResult - {"status":0,"value":{"ELEMENT":":wdc:1430732763623"}}
[DEBUG - 2015-05-04T09:46:03.624Z] WebElementLocator - _handleLocateCommand.elements - {"status":0,"value":{"ELEMENT":":wdc:1430732763623"}}
[DEBUG - 2015-05-04T09:46:03.624Z] WebElementLocator - _handleLocateCommand.rootElement - BODY
[DEBUG - 2015-05-04T09:46:03.625Z] WebElementLocator - _handleLocateCommand - Element(s) Found. Search Stop Time: 1430732768610

      

        
        
        
      

    

And the error message:

org.openqa.selenium.WebDriverException: {"errorMessage":"undefined is not an object (evaluating '(y(a)?y(a).parentWindow||y(a).defaultView:window).getComputedStyle(a,null).MozTransform.match')","request":{"headers":{"Accept":"application/json, image/png","Cache-Control":"no-cache","Connection":"Keep-Alive","Host":"localhost:7356"},"httpVersion":"1.1","method":"GET","url":"/displayed","urlParsed":{"anchor":"","query":"","file":"displayed","directory":"/","path":"/displayed","relative":"/displayed","port":"","host":"","password":"","user":"","userInfo":"","authority":"","protocol":"","source":"/displayed","queryKey":{},"chunks":["displayed"]},"urlOriginal":"/session/5f287dd0-f242-11e4-9753-1726c362b9fc/element/%3Awdc%3A1430732763623/displayed"}}
Command duration or timeout: 229 milliseconds

      

        
        
        
      

    

I added an explicit wait before etc., but it doesn't do anything ... The weird part if this is if I tried this code instead of:

d.findElement(By.xpath("//a[@ui-sref='login']"));
LOG.debug("Login Button Found : ["+loginButton.getAttribute("href")+"]" );
loginButton.click();

      

        
        
        
      

    

I can access the href attribute!
but the click () method doesn't work

[edit] The first PhanstomJS configuration looked like this:

// Change "User-Agent" via page-object capabilities
sCaps.setCapability(PhantomJSDriverService.PHANTOMJS_PAGE_SETTINGS_PREFIX + "userAgent", "My User Agent - Chrome");
//  Disable "web-security", enable all possible "ssl-protocols" and "ignore-ssl-errors" for PhantomJSDriver
sCaps.setCapability(PhantomJSDriverService.PHANTOMJS_CLI_ARGS, new String[] {
                "--web-security=false",
                "--ssl-protocol=any",
                "--ignore-ssl-errors=true",
                "--webdriver-loglevel=DEBUG"
            });


 // Fetch configuration parameters
 // "phantomjs_exec_path"
 if (sConfig.getProperty("phantomjs_exec_path") != null) {
     sCaps.setCapability(PhantomJSDriverService.PHANTOMJS_EXECUTABLE_PATH_PROPERTY, sConfig.getProperty("phantomjs_exec_path"));
} else {
    throw new IOException(String.format("Property '%s' not set!", PhantomJSDriverService.PHANTOMJS_EXECUTABLE_PATH_PROPERTY));
     }
}

      

        
        
        
      

    

Thanks for your help!