I'm taking over a Jigoshop site from another developer, I've extracted the files and imported my database (and connected it all up) and I get this error whenever I try to access any page:
Fatal error: Class 'jigoshop_payment_gateway' not found in /home/site/public/wp-content/plugins/jigoshop-sagepay-server/sagepay-server.php on line 24
If I disable (by deleting, since I can't access wp-admin) that plugin a few others trigger the error then eventually it goes away, and re-enabling them brings it back.
How should I start debugging this? The exact same files and database work on their server, I have now moved it to a Linux server from Windows but cannot find any file-case name inconsistencies.
I believe Jigoshop needs updating, which I'm happy to do but can't find a guide for how to do that manually (if that's even possible?)