aleph 1.0.0-alpha.78 cannot build

[oyzhen]

trafficstars

My Deno version: 1.23.1

Project created by deno run -A https://deno.land/x/[email protected]/cli.ts init --template react

While execute deno task build, error occurs:

Warning deno task is unstable and may drastically change in the future
Task build deno run -A https://deno.land/x/[email protected]/cli.ts build
Download https://deno.land/x/[email protected]/cli.ts
Download https://deno.land/x/[email protected]/lib/serve.ts
Download https://deno.land/[email protected]/io/mod.ts
Download https://deno.land/[email protected]/io/streams.ts
Download https://deno.land/[email protected]/io/util.ts
Download https://deno.land/[email protected]/io/writers.ts
Download https://deno.land/[email protected]/io/files.ts
Download https://deno.land/x/[email protected]/commands/build.ts
Download https://deno.land/x/[email protected]/server/build.ts
Download https://deno.land/x/[email protected]/server/proxy_modules.ts
INFO Proxy modules on http://localhost:6060
error: Uncaught (in promise) TypeError: Import 'http://localhost:6060/server.tsx?t=181bf03e20b' failed: 503 Service Unavailable
    await import(
    ^
    at async https://deno.land/x/[email protected]/commands/build.ts:36:5

[talentlessguy]

try 1.0.0-beta.21 instead, might work