Expression There was an error in an expression in User Input Task at: Neither Variable(s) nor rule(s) found : contents

Hi everyone 

i have an issue that i don't understand i create a user input task with an interface ,  but when i m trying  to save the process  , it is throwing an error of type : Expression There was an error in an expression in User Input Task at: Neither Variable(s) nor rule(s) found : contents . 

What does it mean if someone know  ??? and How i need to fixed that ?? i attached my code of the interface if it is helping 

a!localVariables(
  local!currentStep: 1,

 local!remark,
    
 a!formLayout(
   label: "Task",
   contents:{
     a!sectionLayout(
       contents:{
         a!sectionLayout(
           label: "",
           contents: {
             a!radioButtonField(
               label: "בחר פעולה",
               labelPosition: "ABOVE",
               choiceLabels: {"העברה לחיתום", "העברה לבדיקה נוספת", "דחיה"},
               choiceValues: {1, 2, 3},
               saveInto: {},
               choiceLayout: "STACKED",
               validations: {}
             )
           }
         )
       }
     ),
     a!sectionLayout(
       contents:{
         a!columnsLayout(
           columns:{
             a!columnLayout(
               contents:{
                 a!paragraphField(
                   label: "הערה",
                   labelPosition: "ABOVE",
                   value: local!remark,
                   saveInto:  local!remark,
                   refreshAfter: "UNFOCUS",
                   height: "MEDIUM",
                   validations: {}
                 ),
                 a!buttonArrayLayout(
                   buttons: {
                     a!buttonWidget(
                       label: "שמור",
                       saveInto: {
                         a!save(ri!remarks.Remark,local!remark),
                         a!save(ri!remarks.Canceled,false()),
                         a!save(ri!remarks.Date_Created,now()),
                         a!save(ri!remarks.Created_By_User,user(loggedInUser(),"username")),
                         a!save(ri!remarks.Created_By_GroupName,group(132,"groupName"))
                       },
                       style: "NORMAL"
                     )
                   },
                   align: "START"
                 )
               
               }
             )
           }
         )
       }
     ),
     {
       a!localVariables(
         local!selectedTab: 1,
         {
           {
             choose(
               local!selectedTab,
               {},
               {},
               {
                 /* Replace this rich text with the component or rule that should populate this tab */
                 a!richTextDisplayField(
                   labelPosition: "COLLAPSED",
                   value: {a!richTextItem(text: "The contents of the third tab would go here", style: "EMPHASIS")},
                   align: "CENTER"
                 )
               }
             ),
             {
               /* If using this tab style in a headerContentLayout,              *
                 * remove header, put expression below in the contents parameter, *
                 * and set backgroundColor to transparent. Then, on the parent    *
                 * cardLayout, set showBorder to false and showShadow to true.    */
               a!localVariables(
                 local!tabs: { "פרטי המבקש", "פרטי הבקשה", "נתנוי דירוג והמלצה","מסמכי הלקוח" },
                 local!activeTab: 1,
                 a!cardLayout(
                   contents: {
                     a!cardLayout(
                       contents: {
                         a!columnsLayout(
                           columns: {
                             a!forEach(
                               local!tabs,
                               a!columnLayout(
                                 contents: {
                                   a!cardLayout(
                                     contents: {
                                       a!richTextDisplayField(
                                         value: {
                                           a!richTextItem(
                                             text: local!tabs[fv!index],
                                             color: if(
                                               fv!index = local!activeTab,
                                               "STANDARD",
                                               "ACCENT"
                                             ),
                                             size: "STANDARD",
                                             style: if(
                                               fv!index = local!activeTab,
                                               "STRONG",
                                               "PLAIN"
                                             )
                                           )
                                         },
                                         align: "CENTER"
                                       )
                                     },
                                     link: a!dynamicLink(
                                       value: fv!index,
                                       saveInto: local!activeTab
                                     ),
                                     padding: "LESS",
                                     showBorder: false,
                                     decorativeBarPosition: "BOTTOM",
                                     decorativeBarColor: if(
                                       fv!index = local!activeTab,
                                       "ACCENT",
                                       "#fff"
                                     ),
                                     accessibilityText: if(
                                       fv!index = local!activeTab,
                                       "Selected Tab.",
                                       "Unselected Tab. Press enter to select tab."
                                     )
                                   )
                                 },
                                 width: "NARROW"
                               )
                             )
                           },
                           marginBelow: "NONE",
                           spacing: "NONE"
                         ),
                         a!cardLayout(padding: "NONE")
                       },
                       padding: "NONE",
                       showBorder: false
                     ),

                     a!cardLayout(
                       contents: choose(
                         local!activeTab,
                         {
                           /* Replace this rich text with the component or rule that should populate this tab */
                           rule!PA_Reusable_Client_details(ri!customer)

                         },
                         {
                           /* Replace this rich text with the component or rule that should populate this tab */


                           rule!PA_Reusable_Information_Credit_Request(ri!creditRequest)

                        
                         },
                         {


                           /* Replace this rich text with the component or rule that should populate this tab */

                           rule!PA_reusable_interface_DB_Pratiks_data()

                         },
                         {
                           a!sideBySideLayout(
                             items: {
                               a!sideBySideItem(
                                 item: a!documentViewerField(
                                   label: "Document Viewer",
                                   labelPosition: "ABOVE",
                                   document: 5889,
                                   height: "MEDIUM"
                                 )
                               )

                             }
                           )
                           /* Replace this rich text with the component or rule that should populate this tab */
                         
                         }
                       ),
                       padding: "EVEN_MORE",
                       showBorder: false
                     )
                   },
                   padding: "NONE"
                 )
               )
             }
           }
         }
       )
     }

   },
   buttons: a!buttonLayout(
     primaryButtons: {
       a!buttonWidget(
         label: "Go Back",
         value: local!currentStep - 1,
         saveInto: local!currentStep,
         showWhen: or( local!currentStep = {2,3} )
       ),
       a!buttonWidget(
         label: if( local!currentStep = 1, "Next", "Go to Review"),
         value: local!currentStep + 1,
         saveInto: local!currentStep,
         showWhen: or( local!currentStep = {1,2} ),
         validate: true
       ),
       a!buttonWidget(
         label: "Onboard Employee",
         submit: true,
         style: "PRIMARY",
         showWhen: local!currentStep = 3
       )
     }
   )
 )
    
    
   
  
 

)