For every API Key i entered (new easysocial installation) im getting a error with the message: ''The MD5 hash of the downloaded file does not match. Please contact our support team to look into this.'' What can i do?

For every API Key i entered with a new installatie i get a error with message:

The MD5 hash of the downloaded file does not match. Please contact our support team to look into this.

Can you please help me? Why i've got this error? is it because my EasySocial Professional is EXPIRED?

Thanks for your support!