We are using email templates in which we use transation field where we are showing the next month.

Before the below freemarker code was working for this:

${transaction.custbody_nextmonth?string.MMMM?lower_case}

However this is no longer supported since if we create a new template we get an error:

Expected a hash, but this has evaluated to a string

Does anyone know how we can get the nextmonth and how the above code should be changed according to the new standard?

Since this was working before.