I purchased vendor gear from the Amazon Fury III vendor (Fallen God armor) and salvaged it but got no Monster essence. I then ran the Olympus raid and salvaged the gear and received no essence. Same thing happened with salvaged Deluge gear and I received no ocean essence. Why am I not being credited essence? Is there a glitch? Or is there a specific place where the gear needs to be salvaged?
Those R&D materials were removed from the game during the R&D overhaul in 2018. They were only used to craft Olympian Equipment mods, equipment mods were replaced by Augments.
I also wanted to point out that any feats attached to obsolete R&D items are autogranted to everyone.
