can't attach a file to a forum post

Affiliation
American Association of Variable Star Observers (AAVSO)
Sat, 08/03/2024 - 20:38

It is probably me, I have not posted on any AAVSO forum in a while, but I want to attach a file to a post, but the chose file tab is grayed out.  If I hover over the "no files seleted" I get the no-go sign.  If I click on the "Files Upload", the add a new file disappears???  Please advise.

Bruce