Just one of the issues I have come across on a fresh install of 2.2.1 and then upgrading to 2.2.2 was going to 'System > Integrations' and there is no button to 'add new integration'.
Any advice on this one?
You can upgrade your version using command line,
Just open composer.json file from root, change
"version": "2.2.1", to "version": "2.2.2",
"magento/product-community-edition": "2.2.1", to "magento/product-community-edition": "2.2.2",
save composer.json file.
Run command from root of your system,
I think you misunderstood. I have successfully upgraded from 2.2.1 to 2.2.2 - but the issues are related to 2.2.2
You have some issue with the up-gradation , as there is no issue/bug related to magento 2.2.2
System->Integration->Add New Integration button is there in magento 2.2.2
Try to change your deploy:mode - Change Mode to Developer by running this command
php bin/magento deploy:mode:set developer
And check if its works or not. Also remove the var/generation directory and run below commands:
php bin/magento setup:di:compile
php bin/magento cache:clean
php bin/magento cache:flush
If Issue Solved, Click Kudos/Accept As solutions.