Parsing temporal table join throws cryptic exceptions

SELECT * " +
      "FROM Orders AS o JOIN " +
      "RatesHistoryWithPK FOR SYSTEM_TIME AS OF 'o.rowtime' AS r " +
      "ON o.currency = r.currency

java.lang.AssertionError: cannot convert CHAR literal to class org.apache.calcite.util.TimestampString

SELECT * " +
      "FROM Orders AS o JOIN " +
      "RatesHistoryWithPK FOR SYSTEM_TIME AS OF o.rowtime + INTERVAL '1' SECOND AS r " +
      "ON o.currency = r.currency

java.lang.AssertionError: no unique expression found for {id: o.rowtime, prefix: 1}; count is 0