Invalid cron schedule

[Lorenzo0111]

Version: Deno 1.43.3

When I run the following code with deno run --unstable-cron test.ts I get an exception but the cron expression is correct.
Error:

error: Uncaught (in promise) TypeError: Invalid cron schedule
Deno.cron("Example cron", "0 * 7-12 * * *", () => {
     ^
    at Object.cron (ext:deno_cron/01_cron.ts:75:15)
    at file:///home/lorenzo/projects/supplenze-bot/test.ts:1:6

Code:

Deno.cron("Example cron", "0 * 7-12 * * *", () => {
  console.log("Hello world");
});

[Lorenzo0111]

Found that the expression was wrong