Version 2023.001.20064 64-bit Windows 10.

Copying text from a document that's opened in protected mode causes an error box to appear with "Bad parameter". The OK button on the box needs to be clicked to make the box go away. The copied text still appears on the Windows clipboard as expected.

I found a post on the forums describing this bug dating from 2018 - that's five years ago: https://community.adobe.com/t5/acrobat-reader-discussions/acrobat-reader-dc-quot-bad-parameter-quot-when-trying-to-copy-text/td-p/10136457