terrascan: cli/run.go:110 scan run failed{error 26 0 failed to initialize OPA policy engine}

Hi Team,

Terrascan is failing while doing scan. We are using docker image to run terrascan accurics/terrascan:1.5.0 Command we are using to run

   terrascan init
   terrascan scan --use-colors t .

Error we are facing.

2022-03-03T05:[40](h):57.980Z	error	opa/engine.go:219	error compiling rego files{rule 15 0 authUsersReadAccess <nil>} {raw rego 15 0 package accurics
authUsersReadAccess[retVal] {
    bucket := input.aws_s3_bucket[_]
    bucket.config.acl == "authenticated-read"
    traverse = "acl"
    retVal := { "Id": bucket.id, "ReplaceType": "edit", "CodeType": "attribute", "Traverse": traverse, "Attribute": "acl", "AttributeDataType": "string", "Expected": "private", "Actual": bucket.config.acl }
}
authUsersReadAccess<no value>[retVal] {
    bucket := input.aws_s3_bucket_acl[_]
    bucket.config.acl == "authenticated-read"
    traverse = "acl"
    retVal := { "Id": bucket.id, "ReplaceType": "edit", "CodeType": "attribute", "Traverse": traverse, "Attribute": "acl", "AttributeDataType": "string", "Expected": "private", "Actual": bucket.config.acl }
} <nil>} {error 26 0  1 error occurred: authUsersReadAccess:11: rego_parse_error: unexpected assign token: non-terminated set
	    bucket := input.aws_s3_bucket_acl[_]
	           ^}
2022-03-03T05:40:57.982Z	error	opa/engine.go:261	error compiling rego files{policy path 15 0 /home/terrascan/.terrascan/pkg/policies/opa/rego/aws <nil>} {error 26 0  1 error occurred: authUsersReadAccess:11: rego_parse_error: unexpected assign token: non-terminated set
	    bucket := input.aws_s3_bucket_acl[_]
	           ^}
2022-03-03T05:40:57.983Z	error	runtime/executor.go:124	failed to initialize OPA policy engine
2022-03-03T05:40:57.984Z	error	cli/run.go:110	scan run failed{error 26 0  failed to initialize OPA policy engine}