HTML Widgets; Bank Entry; Clearing Account Id in grid fails to save Batch with serialization error

Clearing an Account Id in the Bank Entry HTML Widget, Transaction grid and attempting to save the Batch caused a serialization error such as:

Failed to deserialise JSON string to object. 
Error converting value {null} to type 'System.Decimal'. Path 'Transactions[0].Splits[0].Balance', line 1, position 436. 
Null object cannot be converted to a value type.

The following HTML Widget has been updated:

• HtmlWidget_BankEntry
• Version: 1.05 (13/10/2021)