I see a new type of error
Failed to install template {:message=>"Failed to load template file '/etc/logstash/elastic-fortigate-template.json': Unrecognized token 'te': was expecting (JSON String, Number, Array, Object or token 'null', 'true' or 'false')\n at [Source: (byte[])\"te\": \"fortigate*\",\n \"settings\": {\n \"index.refresh_interval\": \"5s\",\n \"number_of_shards\" : 1,\n \"number_of_replicas\" : 0\n },\n \"mappings\": {\n \"fortigate\": {\n \"dynamic_templates\": [\n {\n \"notanalyzed\": {\n \"match\": \"*\",\n \"match_mapping_type\": \"string\",\n \"mapping\": {\n \"type\": \"string\",\n \"index\": \"not_analyzed\",\n \"doc_values\": \"true\"\n }\n }\n }\n ],\n \"properties\": \"[truncated 7532 bytes]; line: 1, column: 4]", :exception=>LogStash::ConfigurationError, :backtrace=>["/usr/share/logstash/vendor/bundle/jruby/3.1.0/gems/logstash-output-elasticsearch-11.22.2-java/lib/logstash/outputs/elasticsearch/template_manager.rb:106:inread_template_file'", "/usr/share/logstash/vendor/bundle/jruby/3.1.0/gems/logstash-output-elasticsearch-11.22.2-java/lib/logstash/outputs/elasticsearch/template_manager.rb:23:in install_template'", "/usr/share/logstash/vendor/bundle/jruby/3.1.0/gems/logstash-output-elasticsearch-11.22.2-java/lib/logstash/outputs/elasticsearch.rb:663:in install_template'", "/usr/share/logstash/vendor/bundle/jruby/3.1.0/gems/logstash-output-elasticsearch-11.22.2-java/lib/logstash/outputs/elasticsearch.rb:371:in finish_register'", "/usr/share/logstash/vendor/bundle/jruby/3.1.0/gems/logstash-output-elasticsearch-11.22.2-java/lib/logstash/outputs/elasticsearch.rb:328:in block in register'", "/usr/share/logstash/vendor/bundle/jruby/3.1.0/gems/logstash-output-elasticsearch-11.22.2-java/lib/logstash/plugin_mixins/elasticsearch/common.rb:172:in `block in after_successful_connection'"]}