Can you send a screenshot? So that we may know the issue exactly.
As we are checking on changing name from Preferences--> Store Contacts
EShop name is changed in the email subject too.
To resolve the issue,
Please set 'allow_url_fopen = On' and 'allow_url_include = On' in php.ini
Also please make sure that there issue no issue in your internet connection because many times this error arises due to a connection problem.
Also, make sure that your server configuration is compatible with QloApps. You can find the required configuration in this guide.
Please go through the guide very carefully. And if still there is an issue then please share your FTP details and URL on which you are trying to install QloApps over the ticket.