It looks like the fix discussed in
https://www.axisandallies.org/forums/topic/37967/triplea-posting-to-forum-currently-does-not-work
will resolve your issue, too.
I am playing a play by forum game of A&A G40 but I am having some problems. When I am done with my turn and I click on the button to post the turn summary to the forums here it says “Summary Text: Incorrect Password”. And when I try to do a test post it says “Incorrect Password”. I have been manually attaching the file to posts in the forum since it will not post through TripleA, but the last time I tried to do it it said that the file was too large. What am I doing wrong?
Sounds like you aren’t putting in the correct password for your A&A forums account.
If it’s working right, then you should be able to click “test post” prior to your turn and a test post will come up in the appropriate forum thread.
Doublecheck that you have play-by-forum turned on, that you have the right password and account name, and that you have the correct game id in the pbf section.