Version 424: Can't set up DB from Superset 2.1.0

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It seems to connect OK from Superset 1.5/Python 3.7, but not Superset 2.1

The connection string is trino://trino@trino-test:8080/mongodb
When I click "test connection" or "Connect to database", I get the following error (to pretty much every type of config is (ie., with/without username, with/without catalog):

ERROR: (builtins.NoneType) None
[SQL: TrinoUserError(type=USER_ERROR, name=NOT_SUPPORTED, message="Time zone not supported: Host", query_id=20230820_213230_00037_qsydp)]
(Background on this error at: https://sqlalche.me/e/14/dbapi)

Superset Versions:
sqlalchemy-trino: 0.5.0
trino: 0.326.0
Python 3.11

trino-test server (RPM version 424):

mongodb.properties:
connector.name=mongodb
mongodb.connection-url=mongodb://test01-cl01:27017/

config.properties:
#single node install config
coordinator=true
node-scheduler.include-coordinator=true
http-server.http.port=8080
http-server.log.path=/var/log/trino/http-request.log
discovery.uri=http://trino-test:8080

Error on trino-test side:
2023-08-20T14:42:21.774-0400 INFO dispatcher-query-9 io.trino.event.QueryMonitor TIMELINE: Query 20230820_184221_00006_k3u6m :: FAILED (NOT_SUPPORTED) :: elapsed 0ms :: planning 0ms :: waiting 0ms :: scheduling 0ms :: running 0ms :: finishing 0ms :: begin 2023-08-20T14:42:21.774-04:00 :: end 2023-08-20T14:42:21.774-04:00
2023-08-20T14:43:02.435-0400 INFO dispatcher-query-10 io.trino.event.QueryMonitor TIMELINE: Query 20230820_184302_00007_k3u6m :: FAILED (NOT_SUPPORTED) :: elapsed 0ms :: planning 0ms :: waiting 0ms :: scheduling 0ms :: running 0ms :: finishing 0ms :: begin 2023-08-20T14:43:02.435-04:00 :: end 2023-08-20T14:43:02.435-04:00

As I said, I tried this on an old Superset (I think it was running Python 3.7) and all is well.

Please let me know if you need anything more.

Thanks!