If you wanted to do a item it would look like this
"energybrew": {
"Type": "item",
"Description": "Energy Brew (50x)",
"Price": 50,
"Items": [{
"Quality": 0,
"ForceBlueprint": false...
So here is your problem
"tekengram":{
"Type":"unlockengram",
"Description":"Engram TEK Boots & Gloves",
"Price":20,
"Items":[
{
"Blueprint":"Blueprint'/Game/PrimalEarth/CoreBlueprints/Items/Armor/TEK/PrimalItemArmor_TekBoots.PrimalItemArmor_TekBoots'"
}...
That means you dont have somthing written right in the config use this website to help verify that everything is typed correctly
Just copy and paste your text into it and it will show where you have errors
https://jsonlint.com/
Also if you post your config file here I can look at it and help you