BackWPup – conflicting with Backblaze storage save

[jimiero]

If you have this plugin installed on the website: BackWPup – WordPress Backup Plugin ( https://wordpress.org/plugins/backwpup/ ) when you try to setup Backblaze storage, it throws a critical error

I've reproduced and also a customer reported it

#0 /home/*******/public_html/wp-content/plugins/backwpup/vendor/guzzlehttp/guzzle/src/HandlerStack.php(42): GuzzleHttp\choose_handler() #1 /home/*******/public_html/wp-content/plugins/backwpup/vendor/guzzlehttp/guzzle/src/Client.php(65): GuzzleHttp\HandlerStack::create()

[Ars92]

This issue is due to the fact that both XCloner and BackWPup are using different versions of Backblaze libraries.
To fix that, we should use different namespaces for vendor libraries.
mozart or php-scoper should be integrated in our deploy script to solve this issue.