After updating to version 8.5.3 I get this error: "Interface 'League\Flysystem\AdapterInterface' not found".
The way I updated was I uploaded the concrete directory to my updates folder and then ran the update from the dashboard. It updated without any errors, but when I went back to my home page I got that error. Now I cannot even login because of this error.
Please help. I don't want to start all over from scratch but I can if I have to since this site has none of my content yet.