I have just upgraded from Magento 2.1.16 to Magento 2.3.0, and I am not able to connect to the Magento Market place I am keep getting an error message when i enter the Private and Public Key
Preconditions (*)
- Connecting to Marketplace using Private and Public Key
 
- I have confirmed that /var/www/html/var/composer_home/ this folder is available and permissions are

 
Steps to reproduce (*)
- Enter Keys from Marketplace Profile
 
Expected result (*)
- Expected to see the results and install new extensions.
 
Actual result (*)
- Getting Error Message Path "/var/www/html/var/composer_home/" cannot be used with directory "/var/www/html/var/composer_home/"
 
