I am trying to open my first ACSM ebook, and keep on getting this error message. I am using a standard PC laptop running Microsoft Office and the likes, not Nook or an e-reader. I had no problems setting up Adobe Digital Edition and registering my laptop with Adobe. That seems to work fine.
However, I cannot open the one ACSM book I bought as I keep getting this request expired message. I am utterly baffled by the 'check your Time zone' solution. I am based in the UK, bought the ACSM on a UK website to read on my laptop. Am I meant to set my time zone to that of Adobe in the US? Should it be the same as that of the website I bought the book from?? How do I know what. or rather whose, time zone I should be on? I am after all in the correct time zone for where I live!
My internet time settings are set to synchronise with 'time.windows.com'. I really really do not know what to do. I have re-synchronised the time, deleted then redownloaded the file, nothing will work. It has been three days now, and I still can't open the book.
The ebook store you bought it from may use invalid/ outdated certificates. Check their knowledge base or contact their support.
Which operating system are you using? Is the time zone set to the same time zone you are located in?
It would be great and helpful if you upload a screen shot of the error message you are getting.