Error loading Elasticsearch template: could not load template: couldn't load template: couldn't load json

[liu-xiao-guo]

I am trying it using the latest 7.5.0 Elasticsearch, and I get the error like:
ERR Failed to connect: Connection marked as failed because the onConnect callback failed: Error loading Elasticsearch template: could not load template: couldn't load template: couldn't load json. Error: 400 Bad Request. Response body: {"error":{"root_cause":[{"type":"mapper_parsing_exception","reason":"Root mapping definition has unsupported parameters: [default : {_meta={version=1.0.0}, dynamic_templates=[{fields={path_match=fields., mapping={type=keyword}, match_mapping_type=string}}, {docker.container.labels={path_match=docker.container.labels., mapping={type=keyword}, match_mapping_type=string}}, {fields={path_match=fields., mapping={type=keyword}, match_mapping_type=string}}, {docker.container.labels={path_match=docker.container.labels., mapping={type=keyword}, match_mapping_type=string}}, {fields={path_match=fields., mapping={type=keyword}, match_mapping_type=string}}, {docker.container.labels={path_match=docker.container.labels., mapping={type=keyword}, match_mapping_type=string}}, {strings_as_keyword={mapping={ignore_above=1024, type=keyword}, match_mapping_type=string}}], date_detection=false, properties={kubernetes={properties={container={properties={image={ignore_above=1024, type=keyword}, name={ignore_above=1024, type=keyword}}}, pod={properties={name={ignore_above=1024, ty ...