when i login to the admin panel i see in the messages a message with this:
subject: Critical Error
message:Error: Error in data of page with controller: 'pages/product/manufacturer'. Please check for key_value present where key_param was set
why i see this message?
This looks like a problem with layout in one of manufactures. This could be just one time issue.
What version do you use?
I use the last version
check table pages of your database and show content here