error: Uncaught Error: Input watch path is neither a file nor a directory.

error: Uncaught Error: Input watch path is neither a file nor a directory.
    at new FsWatcher (ext:runtime/40_fs_events.js:17:21)
    at Object.watchFs (ext:runtime/40_fs_events.js:60:10)
    at ext:deno_node/_fs/_fs_watch.ts:58:21
    at Object.action (ext:deno_web/02_timers.js:151:11)
    at handleTimerMacrotask (ext:deno_web/02_timers.js:65:10)
    at eventLoopTick (ext:core/01_core.js:189:21)

deno run --allow-read --allow-env --allow-net --allow-sys  index.ts