runtime error

Exit code: 1. Reason: > shiny::runApp('/app', host='0.0.0.0', port=7860) Loading required package: shiny Error in `get_default_dataframe_engine()`: ! No compatible database engine installed for DataFrameSource ℹ Install either duckdb or RSQLite: `install.packages("duckdb")` `install.packages("RSQLite")` Backtrace: ▆ 1. └─shiny::runApp("/app", host = "0.0.0.0", port = 7860) 2. ├─shiny::as.shiny.appobj(appDir) 3. └─shiny:::as.shiny.appobj.character(appDir) 4. └─shiny::shinyAppDir(x) 5. └─shiny:::shinyAppDir_appR("app.R", appDir, options = options) 6. └─shiny (local) appObj() 7. └─shiny (local) func(fname, ...) 8. └─shiny:::sourceUTF8(fullpath, envir = new.env(parent = sharedEnv)) 9. └─base::eval(exprs, envir) 10. └─base::eval(exprs, envir) 11. ├─shiny::..stacktraceon..(...) at /app/app.R:1:1 12. └─querychat::querychat(...) at /app/app.R:24:1 13. └─QueryChat$new(...) 14. └─querychat (local) initialize(...) 15. └─querychat:::normalize_data_source(data_source, table_name) 16. └─DataFrameSource$new(data_source, table_name) 17. └─querychat (local) initialize(...) 18. ├─engine %||% get_default_dataframe_engine() 19. └─querychat:::get_default_dataframe_engine() 20. └─cli::cli_abort(...) 21. └─rlang::abort(...) Execution halted

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