Concrete not working since clearing cache

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I have been doing a website with concrete5 v.5.7, i have edited the header and some styles while doing a new theme copying the elemental one and changing a few things.
My problem is that i read that for editing themes was better to not use cache so i remove it and since then i can't access to my website and i get the following error:
Class '\Application\Block\Autonav\Controller' not found
Removing manually the cache didn't help. Any tips of how can i recover my webpage?
Thanks for everything.
I read that the solution was reinstalling but i don't know wich is the problem so i would copy the files with the problem again.
In the folder application/block/autonav it does exist a controller.php so i am a little bit lost.