InvalidArgumentException when installing or updating a D8 module (authorize.php)

Hi everyone,

This issue occurs when, using ng-lightbox, i try to update or install any module with D8 admin (i don't know if it happens too using Drupal Console or Drush, i'm not skilled enough to master these tools).

INSTALLING A MODULE:

After the download step, myTestServer/core/authorize.php returns this screen ( "myTestServer" stands for an example):

The website encountered an unexpected error. Please try again later.
InvalidArgumentException: Source path http://myTestServer/admin/modules/install has to start with a slash. in Drupal\Core\Path\AliasManager->getAliasByPath() (line 191 of core/lib/Drupal/Core/Path/AliasManager.php).

Drupal\Core\Path\AliasManager->getAliasByPath('http://myTestServer/admin/modules/install')
Drupal\ng_lightbox\NgLightbox->isNgLightboxEnabledPath(Object)
ng_lightbox_link_alter(Array, NULL, NULL)
Drupal\Core\Extension\ModuleHandler->alter('link', Array)
Drupal\Core\Utility\LinkGenerator->generate(Object, Object)
Drupal\Core\Render\Element\Link::preRenderLink(Array)
call_user_func(Array, Array)
Drupal\Core\Render\Renderer->doRender(Array, )
Drupal\Core\Render\Renderer->render(Array)
Drupal\Core\Template\TwigExtension->escapeFilter(Object, Array, 'html', NULL, 1)
__TwigTemplate_3cde6740d352279c418edb9458fc178c1230f40579e1f6d162d9d8140ada6d57->doDisplay(Array, Array)
Twig_Template->displayWithErrorHandling(Array, Array)
Twig_Template->display(Array)
Twig_Template->render(Array)

...

INSTALLING A MODULE:

After the download step, myTestServer/core/authorize.php returns this screen:

The website encountered an unexpected error. Please try again later.
InvalidArgumentException: Source path http://myTestServer/update.php has to start with a slash. in Drupal\Core\Path\AliasManager->getAliasByPath() (line 191 of core/lib/Drupal/Core/Path/AliasManager.php).

Drupal\Core\Path\AliasManager->getAliasByPath('http://myTestServer/update.php')
Drupal\ng_lightbox\NgLightbox->isNgLightboxEnabledPath(Object)
ng_lightbox_link_alter(Array, NULL, NULL)
Drupal\Core\Extension\ModuleHandler->alter('link', Array)
Drupal\Core\Utility\LinkGenerator->generate(Object, Object)
Drupal\Core\Render\Element\Link::preRenderLink(Array)
call_user_func(Array, Array)
Drupal\Core\Render\Renderer->doRender(Array, )
Drupal\Core\Render\Renderer->render(Array)
...

The update process seems to achieve, as i refresh myTestServer/core/authorize.php, and then get a success message.

But it's confusing...

Thank you !!