ASA5506 ver. 5.4.1
When I try to upload an update file (Network Sensor Parch 126.96.36.199) from my computer in ASDM console, I get an error Bad Gateway "The proxy server received an invalid respose from an upstream server”.
You should first update to version 188.8.131.52 and then upload to 184.108.40.206.
Take a look to Release Notes of 220.127.116.11
Please mark it as Useful if so.
Also, keep in mind the below:
"If you update a Defense Center from Version 18.104.22.168, the system re-installs all intrusion rule updates instead of the latest intrusion rule update and the update takes much longer than the projected time listed in the Time and Disk Space Requirements for Updating to Version 22.214.171.124. To reduce update time, Cisco strongly recommends updating to Version 126.96.36.199, then updating from Version 188.8.131.52 to Version 184.108.40.206."