Hello. I also faced this problem. I tried many things but without success. However, I managed to fix it using the Windows CMD. I wrote the command msiexec.exe /i "C:\UnrealDatasmithMaxExporter.msi" (the path to the installer) and launched the installation in this way. I hope this helps you and other people because I spent more than 12 hours on this, and in the end, my girlfriend came up with this solution. If you still encounter difficulties, you can contact me, and I will list the other methods I used that could have influenced this. I hope the text is clear because I used Chat for translation)))
Can you elaborate a little more? I am having the same issue and I dont really understand your solution.