That sounds logical - I must be doing something fundamentally wrong, or there is an error somewhere in my network or implementation that I haven’t detected…
I will also try on my other platform, x86 based with application version numbers similar to yours.
I have checked and rechecked myappID and accessKeys, and entered them using cut and paste from the console, so pretty sure that they are correct.
Turned off firewall - no change.
jimgi