Vostro 5415 RAM Upgrade Issue

I just bought a Vostro 5415 and try to upgrade the RAM following this:

https://dl.dell.com/topicspdf/vostro-14-5415-laptop_owners-manual10_en-us.pdf

I installed XPG Hunter 16GB 3200 MHz but my laptop wont start because 0xc0000098 windload.efi. The BIOS recognize the 24 GB. Only boot without the extra RAM.