The only thing I can guess is that either this particular SODIMM is not compatible or it is defective. The problem as I have said, is that some users got it to work while others have had the same problem you have had. This RAM module is available from other sources such as Newegg. Also a 16GB DDR3L RAM module is not a common size which may be a possible problem in a system that was listed in the specs as 8GB maximum.
I have the Inspiron 15 7568 and attempted to upgrade to 16gb DDR3L and get the 2 amber, 5 white lights on power up, indicating invalid memory.  Crucial's website says it will work, but $115 later, it does not. Does anyone have ideas on how to get the machine to recognize this memory?
Inspiron 15-7568 Memory upgrade to 16db