I'm having an issue with the login-page and since this is my first Craft website, I'm a little unsure of where to begin to look.
When attempting to log in to the admin interface, my username/password is rejected only with the message "An unknown error occured". The same goes for trying the "Forgot your password?" function.
As far as I can tell, the only change recently made was running the auto-update to the latest version (2.X) last week. Have not logged back in since, so this could very well be the culprit. The front end loads just fine. I do have a couple of plugins installed, but not sure how I can deactivate them without using the admin interface.
Are there some log files in the /craft folder where I can start to look?
Any help much appreciated.