update record field doesn't work when i test my site and it works when i do the test in the interface

hello everyone , can anyone here help me please , i have develloped an interface and i configiured  the save button in this interface to do the update of a record field this is my code  :

a!buttonWidget(
          saveInto: {
            /*a!save(*/
              /*target: local!currentUserAccount,*/
              /*value: a!update(local!currentUserAccount , 'recordType!{b37748b2-8103-41ea-8028-2b358e4f229c}PBY account.fields.{4a9de4b2-f127-44f1-86d2-21c2a6b2ee2d}Solde', local!newBalance), */
            /*),*/
            a!writeRecords(
              records: local!currentUserAccount,
              onSuccess: a!save(
                target: local!currentUserAccount,
                value: a!update(local!currentUserAccount , 'recordType!{b37748b2-8103-41ea-8028-2b358e4f229c}PBY account.fields.{4a9de4b2-f127-44f1-86d2-21c2a6b2ee2d}Solde', local!newBalance), 
              ),
            )
          },
          label: if(ri!isUpdate, "Save", "Create"),
          submit: true,
          style: "SOLID",
          validate: true
        )

this code work and do the update if i do the test in the interface but when i test it in my interface using the record action " new Transaction " that shows me the interface that contain this botton . the didn't work ! how can solve the problem please