Fix exception in portfolio calculator

apps/api/src/app/portfolio/calculator/twr/portfolio-calculator.ts

@@ -101,6 +101,7 @@ export class TWRPortfolioCalculator extends PortfolioCalculator {
       totalInterestWithCurrencyEffect,
       totalInvestment,
       totalInvestmentWithCurrencyEffect,
+      errors: [],
       historicalData: [],
       totalLiabilitiesWithCurrencyEffect: new Big(0),
       totalValuablesWithCurrencyEffect: new Big(0)

libs/common/src/lib/models/portfolio-snapshot.ts

@@ -13,7 +13,7 @@ export class PortfolioSnapshot {
   @Type(() => Big)
   currentValueInBaseCurrency: Big;
 
-  errors?: AssetProfileIdentifier[];
+  errors: AssetProfileIdentifier[];
 
   hasErrors: boolean;