fixed FTS yaml handling

Author: naman108

FreeTAKServer/core/configuration/MainConfig.py

@@ -377,7 +377,7 @@ def instance(cls, config_file=None):
 
             # if config_file not specified, check env or use default location
             if config_file == None:
-                config_file = str(os.environ.get('FTS_CONFIG_PATH', MainConfig._defaults["yaml_path"]))
+                config_file = str(os.environ.get('FTS_CONFIG_PATH', MainConfig._defaults["yaml_path"]["default"]))
 
             # overlay the yaml config if found
             if os.path.exists(config_file):