When the script to copy a selected URL to DA didn’t work without an error message, I thought to try and do the cut-and-past operation manually. That however didn’t work at all. I’ve restarted the computer several times and I’m quite perplexed. This doesn’t happen in other web browsers, e.g. Safari.
No I haven’t installed any utilities lately. Adobe upgraded its software, which causes problems in other areas, I know, but I understand how to avoid them. Sounds almost like I should try to reinstall DA.