fix params

app/controllers/import/gitlab_projects_controller.rb

@@ -12,9 +12,9 @@ class Import::GitlabProjectsController < Import::BaseController
       return redirect_back_or_default(options: { alert: "You need to upload a GitLab project export archive." })
     end
 
-    imported_file = params[:file].path + "-import"
+    imported_file = project_params[:file].path + "-import"
 
-    FileUtils.copy_entry(params[:file].path, imported_file)
+    FileUtils.copy_entry(project_params[:file].path, imported_file)
 
     @project = Gitlab::ImportExport::ProjectCreator.new(project_params[:namespace_id],
                                                         current_user,