Harman's link to AIR v184.108.40.2062 has now expired, too.
I have asked Harman if they would be willing to re-upload a link to v220.127.116.115 (the last official working AIR runtime for Windows) but, until such a link is available, please download v18.104.22.1685 from FileCroco using the following link:
The file from FileCroco is the official Harman release of AIR v22.214.171.1245 (genuine, clean and safe to use).
I found the SHA256 hash for the 'AdobeAIR.exe' v126.96.36.1995 file on a Harman web page archived by archive.org (search for "https://airsdk.harman.com/runtime" and select the page dated 26 January 2021) and it matches the SHA256 hash of the file from FileCroco.
Filesize: 7,689,512 bytes
Apologies, once again, for the inconvenience.
I hope it won't be too long before Adobe AIR is back on track as Harman certainly seem to have fixed the original problem with v188.8.131.522.