Thank you for your reply. I didn’t realise it could cause things to actually go wrong like that. I thought it would just slow it down or cause a little downtime. I will pay more attention in the future when these errors occur and take my time a bit more.
I have since been able to delete the local files and reinstall the two plugins. I think maybe the server I am on was a bit slow. I was still wondering though why the plugins had been removed instead of being moved to the disabled section. Does anyone know why this happened?