"Commerce Shipping Weight Tariff" shipping services are removed cos of rules error

I get the following error when ajax is trying to refresh the shipping service section and all weight tariff shipping methods are removed.

array(
['type'] =>
'rules'
['message'] =>
'Unable to get a data value. Error: Unable to get the data property type as the parent data structure is not set.'
)

array(
['type'] =>
'rules'
['message'] =>
'Unable to evaluate action commerce_shipping_service_rate_order.'
)

I am using commerce 1.8, entity 1.3, rules 7.x-2.6+1-dev, Commerce Shipping Weight Tariff 7.x-1.0-beta2+2-dev modules.