Error message

• Notice: Undefined offset: 0 in user_node_load() (line 3740 of modules/user/user.module).
• Notice: Trying to get property 'name' of non-object in user_node_load() (line 3740 of modules/user/user.module).
• Notice: Undefined offset: 0 in user_node_load() (line 3741 of modules/user/user.module).
• Notice: Trying to get property 'picture' of non-object in user_node_load() (line 3741 of modules/user/user.module).
• Notice: Undefined offset: 0 in user_node_load() (line 3742 of modules/user/user.module).
• Notice: Trying to get property 'data' of non-object in user_node_load() (line 3742 of modules/user/user.module).