Hello - I was facing the same type of error messages (trying the IDF V4.1) with the ssdp library from ADF. I thought all was up-to-date as I did a git pull at ADF_HOME top level which was already origin/master. Long story short I also did a git pull under esp-adf-libs (which is under ADF_HOME/compon...

Hello - I was chasing the same problem trying to perform an OTA from Amazon S3 with a bucket I created. Tried different combinations and think I found my issue. I by accident used the wrong PEM file. So a few tricks I read up (from the net) is to hit the URL in the browser (for the upgrade file) and...