ReflectionException error on Magento 2

It seems that this module need a special library. If we take a look into the composer.json file located in the module files we can find that he required this library :

 "require" : {
    "ebizmarts/mailchimp-lib": "3.0.*"
  }

So in my case the only solution was to install this library via composer and then install the module also via composer.

To install via composer you need to run :

composer require ebizmarts/mailchimp-lib

composer require mailchimp/mc-magento2

If this will not work try to do the same thing in magento composer. and then run php bin/magento setup:upgrade

i hope this will help!

After about 9 hours of reading through the internet and trying to find a solution, I ended up deleting the contents of my Vendor folder (but NOT .htaccess file) and running composer update command

composer update

This took away the error and I was able to delete the Magemonkey files and redownload the Ebizmarts library file:

composer require ebizmarts/mailchimp-lib

And then enable the Mailchimp extension. THis was the biggest pain in the ass so I hope this helps someone in the future.

Just a note, after doing all this and running the upgrade and compile, you may need to reset permissions on your magento install, as I had to.

I have fixed same issue with composer command.

composer require ebizmarts/mailchimp-lib

You can also download zip folder of library.

https://api.github.com/repos/ebizmarts/mailchimp-lib/zipball/293960203ff1d834af5b2f2726f03063494a2265