expect_values_to_match_regex rule gives out error for all regex

[notmanas]

Hi, I'm trying to run 'expect_values_to_match_regex' rule, but the result has errors that look like this:

Invalid regular expression: '[Aa-Zz]', invalid character class range: a-Z\n[SQL: SELECT first AS unexpected_values \nFROM ge_temp_de90d2b5 \nWHERE first IS NOT NULL AND NOT (first RLIKE %(param_1)s)\n LIMIT %(param_2)s]\n[parameters: {'param_1': '[Aa-Zz]', 'param_2': 20}]\n(Background on this error at: https://sqlalche.me/e/14/f405)\n"/n%22),

regex used: '[Aa-Zz]'
I actually need the regex to check for SSN. The one I'm using is -
'^(?!666|000|9\\\\d{2})\\\\d{3}-(?!00)\\\\d{2}-(?!0{4})\\\\d{4}$'
But this also show error:
Invalid regular expression: '^(?!666|000|9\\d{2})\\d{3}-(?!00)\\d{2}-(?!0{4})\\d{4}$', no argument for repetition operator: ?\n[SQL: SELECT sum(CASE WHEN (ssn IS NOT NULL AND NOT (ssn RLIKE %(param_1)s)) THEN %(param_2)s ELSE %(param_3)s END) AS "column_values.match_regex.unexpected_count", sum(CASE WHEN (ssn IS NULL) THEN %(param_4)s ELSE %(param_5)s END) AS "column_values.nonnull.unexpected_count" \nFROM ge_temp_4b471582]\n[parameters: {'param_1': '^(?!666|000|9\\\\d{2})\\\\d{3}-(?!00)\\\\d{2}-(?!0{4})\\\\d{4}$', 'param_2': 1, 'param_3': 0, 'param_4': 1, 'param_5': 0}]
Rule used:
{"expectation_type": "expect_column_values_to_match_regex", "kwargs": {"column": "ssn", "regex": "^(?!666|000|9\d{2})\d{3}-(?!00)\d{2}-(?!0{4})\d{4}$"}, "meta": {}, "quality_dimension": "Completeness"}
NOTE: Table is in Snowflake
So basically, all regex are throwing errors for me. What's the solution? Am I doing something wrong?