How to deal with this error?

Question

PHP

Good afternoon, dear toasters!
There was a problem after creating a module, or rather a plugin, to display today's date on the page. I added this plugin in the right place, and it happens that the page loads normally, but it happens that it just displays the date on a white background and that's it.
In the chrome console it says:
Uncaught NotFoundError: Failed to execute 'removeChild' on 'Node': The node to be removed is not a child of this node.
mootools-core.js:111
And I can't figure out what the problem is, why is it so?

Answer 1

He asked himself - he figured it out.
It was necessary to put the choice of processing not js but php.
While it works, at least.