fix

app/controllers/server/blocks_controller.rb

 class Server::BlocksController < Server::ApplicationController
+  before_action :load_template, except: [:index]
+
   def index
     @templates = Communication::Block.template_kinds.keys
     breadcrumb
   end
 
   def show
-    @template = params[:id]
-    @blocks = Communication::Block.send(@template)
     breadcrumb
     add_breadcrumb t("enums.communication.block.template_kind.#{@template}")
   end
 
   def resave
-    @template = params[:id]
-    @blocks = Communication::Block.send(@template)
     @blocks.find_each &:save
     redirect_to server_block_path(@template), notice: "#{@blocks.count} blocks saved"
   end
 
   protected
 
+  def load_template
+    @template = params[:id]
+    @blocks = Communication::Block.where(template_kind: @template)
+  end
+
   def breadcrumb
     super
     add_breadcrumb Communication::Block.model_name.human(count: 2), server_blocks_path