Error "Interface 'League\OAuth2\Server\Entities\AccessTokenEntityInterface' not found" after updating from 8.4.4 to 8.5.2

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So I was updated concrete 8.4.4 to 8.5.2 using my hosting sites app installer. I created a full back before proceeding but I was asked to first logging in as admin before proceeding (I thought I was but wasn't). Update went through but now I get error when I visit my site (any page)

An unexpected error occurred.
Interface 'League\OAuth2\Server\Entities\AccessTokenEntityInterface' not found

I tried to restore the back up but the error doesn't change. Any suggestions?

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