I am experiencing the same problem. When ID column name is not specified, Nova passes PendingTranslation class instance instead of column name into $only argument of ExportToExcel::replaceFieldValuesWhenOnResource https://github.com/SpartnerNL/Laravel-Nova-Excel/blob/1.3/src/Actions/ExportToExcel.php#L220.

Temporary fix is to pass name of id column when defining id field - ID::make('ID').