Why a code that works locally does not work when deployed to the cloud?

Questions
,
1

When I run this code locally it does what I expect.
When CloudDeploy-ed, it fails. What I am I doing wrong? ( I am a totally new user of WL)
Thanks.

Conversor1 = FormPage[
  
  {{"Amount", "Amount in Euros"} -> "Number", 
   "Currency" -> {"US dollars", "British Pounds"}, {"Date", 
     "Invoice Date"} -> "Date"},
  
  DatedRate[moneda_, fecha_] := UnitConvert[
    Quantity[1, DatedUnit["Euros", fecha]], 
    DatedUnit[moneda, fecha]];
  
  Conversion[cantidad_, moneda_, fecha_] :=
   
   Return[Times[cantidad, DatedRate[moneda, fecha]]];
  
  Conversion[#Amount, #Currency, #Date] &]
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