My month/year archive template code no longer works in 3.2
This should be fixed for the upcoming 3.2.11 release.

To get the fix early, change your craftcms/cms requirement in composer.json to:

"require": {
  "craftcms/cms": "dev-develop#87fd6ca6b0c57f524c8ccae895c13eb9724d0efa as 3.2.10",
  "...": "..."
}


Then run composer update.