VSC underlines in red "syntax error, unexpected '|', expecting ';' or '{'" - in the place of typing the output of the function, how to cure?

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VSC underlines in red "syntax error, unexpected '|', expecting ';' or '{'" - in the place of function output typing.

So the code is working.

Can anyone come across? How to cure?

I understand that she has a new PHP across her throat? ))

What can be done about it?

Thank you.