Unable to initialize tonlib object in Android project

[Good-rgb]

1、I added JSON
val configStr = Utils.streamToString(openJson)
val build = Tonlib.builder().testnet(true).originalGlobalConfigStr(configStr).build()

2、error log
Error creating tonlib instance: Attempt to invoke virtual method 'org.ton.java.tonlib.types.globalconfig.LiteServers[] org.ton.java.tonlib.types.globalconfig.TonGlobalConfig.getLiteservers()' on a null object reference

[neodix42]

could you please show the value of configStr just before feeding to the Tonlib builder?

[Good-rgb]

Yes, the value of configStr that I printed out has JSON and server node configuration, but initializing Tonlib will result in an error
1、Full Code
val open = assets.open("testnet-global-config.json")
val configStr = Utils.streamToString(open)
val build = Tonlib.builder().testnet(true).originalGlobalConfigStr(configStr).build()

2、This is the path and content of the JSON file

[neodix42]

Thanks for the details. I will try to reproduce the problem an be back to you.