[FIX]

app/controllers/apply_signatures_controller.rb

@@ -69,7 +69,7 @@ class ApplySignaturesController < ApplicationController
   end
 
   def status 
-    params.fetch(:status, "")
+    params.fetch(:status, "all")
   end
 
   def require_owner

app/models/apply_signature.rb

@@ -22,7 +22,7 @@ class ApplySignature < ApplicationRecord
     has_many :attachments, as: :container, dependent: :destroy
 
     scope :with_user_id, -> (user_id) {where(user_id: user_id)}
-    scope :with_status, -> (status) {where(status: status) if status.present?}
+    scope :with_status, -> (status) {where(status: status) if status.present? && status != "all"}
 
     validates :project_id, uniqueness: {scope: :user_id}