The Component Manager page is not loading: «Couldn't get available versions for package mage2pro/core»

Issues
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1

Hi, Just checked that after you installed the extension the component manager page is not loading here is the error i am getting.

An error occurred during execution; please try again later.

Additional information:

RuntimeException

File:
/home/grocerydeals/public_html/setup/src/Magento/Setup/Model/PackagesData.php:88
Message:
Couldn't get available versions for package mage2pro/core
Stack trace:
#0 /home/grocerydeals/public_html/setup/src/Magento/Setup/Controller/ComponentGrid.php(98): Magento\Setup\Model\PackagesData->syncPackagesData()
#1 /home/grocerydeals/public_html/vendor/zendframework/zend-mvc/src/Controller/AbstractActionController.php(82): Magento\Setup\Controller\ComponentGrid->componentsAction()
#2 [internal function]: Zend\Mvc\Controller\AbstractActionController->onDispatch(Object(Zend\Mvc\MvcEvent))
#3 /home/grocerydeals/public_html/vendor/zendframework/zend-eventmanager/src/EventManager.php(444): call_user_func(Array, Object(Zend\Mvc\MvcEvent))
#4 /home/grocerydeals/public_html/vendor/zendframework/zend-eventmanager/src/EventManager.php(205): Zend\EventManager\EventManager->triggerListeners('dispatch', Object(Zend\Mvc\MvcEvent), Object(Closure))
#5 /home/grocerydeals/public_html/vendor/zendframework/zend-mvc/src/Controller/AbstractController.php(118): Zend\EventManager\EventManager->trigger('dispatch', Object(Zend\Mvc\MvcEvent), Object(Closure))
#6 /home/grocerydeals/public_html/vendor/zendframework/zend-mvc/src/DispatchListener.php(93): Zend\Mvc\Controller\AbstractController->dispatch(Object(Zend\Http\PhpEnvironment\Request), Object(Zend\Http\PhpEnvironment\Response))
#7 [internal function]: Zend\Mvc\DispatchListener->onDispatch(Object(Zend\Mvc\MvcEvent))
#8 /home/grocerydeals/public_html/vendor/zendframework/zend-eventmanager/src/EventManager.php(444): call_user_func(Array, Object(Zend\Mvc\MvcEvent))
#9 /home/grocerydeals/public_html/vendor/zendframework/zend-eventmanager/src/EventManager.php(205): Zend\EventManager\EventManager->triggerListeners('dispatch', Object(Zend\Mvc\MvcEvent), Object(Closure))
#10 /home/grocerydeals/public_html/vendor/zendframework/zend-mvc/src/Application.php(314): Zend\EventManager\EventManager->trigger('dispatch', Object(Zend\Mvc\MvcEvent), Object(Closure))
#11 /home/grocerydeals/public_html/setup/index.php(31): Zend\Mvc\Application->run()
#12 {main}
3

It is a Magento 2 core bug:
https://github.com/magento/magento2/issues/6718

The bug is not reproduced in the Magento 2.2 (the current develop branch).
But it remains in the Magento 2.1.5.

4

A working method to upgrade the Composer-based extension is by command-line.
The instruction How to upgrade a Mage2.PRO extension? actually upgrades all the Composer-based extensions installed, not only the Mage2.PRO extensions.

5

2 posts were split to a new topic: Where and how to report a Mage2.PRO extension’s issue? (duplicate)?

6

There is no more «Component Manager» in Magento 2.2: it has been replaced by «Extension Manager» and «Module Manager».