Timing problems in loading libraries from frozen code

Nobody has claimed this yet.

**What would you like to achieve?**
I'm trying to load Google's chart libraries, and I'm hitting timeouts when the page is loaded. If I wait some time, on subsequent loads it works fine. But this leads to the question of just how do I make sure that we're getting the timing right. I'm also seeing (perhaps related) the following error:
`TypeError: Cannot read properties of null (reading 'halos')`
at
```
world.halos().forEach(function (h) {
return h.maskBounds = world.getHaloMask();
});
```
which corresponds to the source code
```
$world.execCommand("open browser", { packageName: "engageLively--galyleo-dashboard", });
```

But the real question is how to load safely

**How are you trying to achieve that**

**Alternative solutions**
If applicable, what other solutions have you tried?

**Additional Resources**
Please provide links to any custom code that might be necessary to grasp your problem. Screenshots of custom component, etc. are also appreciated.

**Version**: Please paste the lively.next commit on which the problem occurred here (use the copy button of the Version Checker in the bottom left corner).
c725a776b26bd744331765a4881ba4c0557d2fea

Start by reproducing the timeout while loading Google's chart libraries from frozen code, then inspect the reported $world.execCommand("open browser", ...) entry point and the world.halos() error. Determine the loading sequence and define completion as reliable library loading without the null-halos failure on the initial page load.

Written by the indexing model from the issue text.