XF 2.2 Error after upgrade


So, i was trying to install the new upgrade of xenforo by pressing the upgrade button in my admincp, but i have this errors now and everyithing it's blocked, How can i fix this?
Thank you,

An exception occurred: [Error] Call to undefined method XF\ComposerAutoload::checkPaths() in src/XF.php on line 287

XF::registerComposerAutoloadDir() in src/XF/App.php at line 2327
XF\App->setupAddOnComposerAutoload() in src/XF/Install/App.php at line 160
XF\Install\App->setup() in src/XF.php at line 485
XF::setupApp() in src/XF/Install/_upgrader/core.php at line 1184
XFUpgraderWeb::create() in install/oc-upgrader.php at line 13
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