Please accept my apologies. I was looking into this problem a bit deeper and realized that the reason your "Price" and "Marketcap" boxes are not populating is because the explorer currently only supports BTC markets when populating those values. I have added this to my TODO list and will add support for ETH and USDT and other markets in the near future. For now, you may want to hide those boxes via the config until a fix is released.
Thanks for letting me know. No rush, but do you have any idea about how long it might take for you to come up with this update?
I have an update for you. When you have a spare moment, stop your explorer, do a
git pull and restart the explorer. I added better support for USD price lookups of any altcoin, so your ETH and USDT pairs should now return proper values. Please keep in mind that for now it only displays the USD value for the default exchange trading pair (as it always did), and not an average of all markets. I plan to add the average market price as an option in the near future, but hopefully this will suffice for now.