Could not load template: couldn't load template: couldn't load json. Error: 400 Bad Request

2020-01-17T09:49:26-06:00 INFO Connected to Elasticsearch version 7.5.0 2020-01-17T09:49:26-06:00 INFO Trying to load template for client: http://0.0.0.0:9200 2020-01-17T09:49:26-06:00 ERR Connecting error publishing events (retrying): Connection marked as failed because the onConnect callback failed: Could not load template: couldn't load template: couldn't load json. Error: 400 Bad Request
I know it seems old template;
I have updated from default to _doc still I get errors, can I get a few suggestion to make compatible with new version 7.5.x. Please.
When I have used this following templates :

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