Magento 2 component manager please wait problem 

In Magento 2 backend, when you try to upgrade modules or Magento using Component Manager, you may get this problem: Magento keeps showing ‘Please wait’ message and it won’t stop.

There are many reasons why you get this issue. However, in our case, it came from custom module composer and here is how we get it solved.

Go to this file:  /setup/src/Magento/Setup/Model/PackagesData.php

Create a backup of this file before editing.

Then replace it using this file:

PackagesData

You can read more discussion about this issue here: https://github.com/magento/magento2/issues/6718

And this is where you can get this file from Magento: PackageData.php from Magento

That’s how we solve the issue when Magento 2 component manager please wait stop loading. Hope it will be helpful.