calling the delete method?

Perhaps you don't need to? Based on line numbers in diagnostic messages, you have modern HTML::Element, which made calling delete superfluous. Maybe just check that's the case with "use HTML::TreeBuilder::XPath -weak;" once, to be sure, but new behaviour is default w/o explicit import.

In reply to Re: Unnesting deeply nested HTML elements (Deep recursion on subroutine "HTML::Element::delete") by Anonymous Monk
in thread Unnesting deeply nested HTML elements (Deep recursion on subroutine "HTML::Element::delete") by mldvx4

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