CDP materialized views recommender service ERROR

[#1]

We're following the materialized view recommender instructions (Materialized view recommendations introduction (cloudera.com))  to test its reliability. The benchmark is tpc-ds (GitHub - hortonworks/hive-testbench). The recommnder reports the following error when testing query 10 (hive-testbench/query10.sql at hdp3 · hortonworks/hive-testbench · GitHub).

Caused by: java.lang.AssertionError: SEMI

    at org.apache.calcite.rel.rel2sql.SqlImplementor.joinType(SqlImplementor.java:358) ~[calcite-core-1.21.0.7.2.3.0-220.jar:1.21.0.7.2.3.0-220]

Can anyone help fix this problem?