failed generate html.[err]The following has evaluated to null or missing: ==> img [in template “1646332772333150209” at line 81, column 82] Tip: If the failing expression is known to be legally null/missing, either specify a default value with myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing

. (These only cover the last step of the expression; to cover the whole expression, use parenthessis: (myOptionVar.foo)!myDefault, (myOptionVar.foo)?? The failing instruction: ==> ${img} [in template “1646332772333150209” at line 81, column 80]