Unknown column in Having Clause
Havin can only use colmuns that are in the GROUP By or SELECT. But START_TS as columns doesn't exist, so you must use an ALIAS  to get your dates.
Schema (MySQL v5.7)
CREATE TABLE tableName (
  `START_TS` date,
  `resource_key` int,
  `INTERACTION_RESOURCE_ID` varchar(4)
);

INSERT INTO tableName
  (`START_TS`, `resource_key`, `INTERACTION_RESOURCE_ID`)
VALUES
  ('2020-08-27' , 772122, 'test'),
    ('2020-08-27' , 772122, 'test')
;


Query #1
Select date(START_TS) date_ts, MIN(resource_key), count(INTERACTION_RESOURCE_ID) 
From tableName
Group By date(START_TS), resource_key 
Having date_ts &gt;= '2020-08-27' and resource_key in (772122, 772134);

| date_ts    | MIN(resource_key) | count(INTERACTION_RESOURCE_ID) |
| ---------- | ----------------- | ------------------------------ |
| 2020-08-27 | 772122            | 2                              |


View on DB Fiddle