When I try to load the counsel comes up and this is displayed, I looked through the file and all the tesla stuff was gone and I don't have anything that uses tesla.
Detailed RF API diagnostics:
* RF API class 'EnergyStorage' is loaded from: jar:file:/C:/Users/Olaf%20Coleman/Documents/Curse/Minecraft/Instances/FTB%20Presents%20HermitPack/mods/BrandonsCore-1.10.2-2.1.1.61-universal.jar!/cofh/api/energy/EnergyStorage.class
* RF API class 'IEnergyConnection' is loaded from: jar:file:/C:/Users/Olaf%20Coleman/Documents/Curse/Minecraft/Instances/FTB%20Presents%20HermitPack/mods/BrandonsCore-1.10.2-2.1.1.61-universal.jar!/cofh/api/energy/IEnergyConnection.class
* RF API class 'IEnergyContainerItem' is loaded from: jar:file:/C:/Users/Olaf%20Coleman/Documents/Curse/Minecraft/Instances/FTB%20Presents%20HermitPack/mods/BrandonsCore-1.10.2-2.1.1.61-universal.jar!/cofh/api/energy/IEnergyContainerItem.class
* RF API class 'IEnergyHandler' is loaded from: jar:file:/C:/Users/Olaf%20Coleman/Documents/Curse/Minecraft/Instances/FTB%20Presents%20HermitPack/mods/BrandonsCore-1.10.2-2.1.1.61-universal.jar!/cofh/api/energy/IEnergyHandler.class
* RF API class 'IEnergyProvider' is loaded from: jar:file:/C:/Users/Olaf%20Coleman/Documents/Curse/Minecraft/Instances/FTB%20Presents%20HermitPack/mods/BrandonsCore-1.10.2-2.1.1.61-universal.jar!/cofh/api/energy/IEnergyProvider.class
* RF API class 'IEnergyReceiver' is loaded from: jar:file:/C:/Users/Olaf%20Coleman/Documents/Curse/Minecraft/Instances/FTB%20Presents%20HermitPack/mods/BrandonsCore-1.10.2-2.1.1.61-universal.jar!/cofh/api/energy/IEnergyReceiver.class
* RF API class 'IEnergyStorage' is loaded from: jar:file:/C:/Users/Olaf%20Coleman/Documents/Curse/Minecraft/Instances/FTB%20Presents%20HermitPack/mods/BrandonsCore-1.10.2-2.1.1.61-universal.jar!/cofh/api/energy/IEnergyStorage.class
* RF API class 'ItemEnergyContainer' is loaded from: jar:file:/C:/Users/Olaf%20Coleman/Documents/Curse/Minecraft/Instances/FTB%20Presents%20HermitPack/mods/BrandonsCore-1.10.2-2.1.1.61-universal.jar!/cofh/api/energy/ItemEnergyContainer.class
* RF API class 'TileEnergyHandler' is loaded from: jar:file:/C:/Users/Olaf%20Coleman/Documents/Curse/Minecraft/Instances/FTB%20Presents%20HermitPack/mods/BrandonsCore-1.10.2-2.1.1.61-universal.jar!/cofh/api/energy/TileEnergyHandler.class
Detailed Tesla API diagnostics:
* Tesla API class 'Tesla' could not be loaded (reason: java.lang.ClassNotFoundException: net.darkhax.tesla.Tesla)
* Tesla API class 'TeslaCapabilities' could not be loaded (reason: java.lang.ClassNotFoundException: net.darkhax.tesla.capability.TeslaCapabilities)
* Tesla API class 'ITeslaConsumer' could not be loaded (reason: java.lang.ClassNotFoundException: net.darkhax.tesla.api.ITeslaConsumer)
* Tesla API class 'ITeslaHolder' could not be loaded (reason: java.lang.ClassNotFoundException: net.darkhax.tesla.api.ITeslaHolder)
* Tesla API class 'ITeslaProducer' could not be loaded (reason: java.lang.ClassNotFoundException: net.darkhax.tesla.api.ITeslaProducer)
* Tesla API class 'BaseTeslaContainer' could not be loaded (reason: java.lang.ClassNotFoundException: net.darkhax.tesla.api.implementation.BaseTeslaContainer)
* Tesla API class 'BaseTeslaContainerProvider' could not be loaded (reason: java.lang.ClassNotFoundException: net.darkhax.tesla.api.implementation.BaseTeslaContainerProvider)
* Tesla API class 'InfiniteTeslaConsumer' could not be loaded (reason: java.lang.ClassNotFoundException: net.darkhax.tesla.api.implementation.InfiniteTeslaConsumer)
* Tesla API class 'InfiniteTeslaConsumerProvider' could not be loaded (reason: java.lang.ClassNotFoundException: net.darkhax.tesla.api.implementation.InfiniteTeslaConsumerProvider)
* Tesla API class 'InfiniteTeslaProducer' could not be loaded (reason: java.lang.ClassNotFoundException: net.darkhax.tesla.api.implementation.InfiniteTeslaProducer)
* Tesla API class 'InfiniteTeslaProducerProvider' could not be loaded (reason: java.lang.ClassNotFoundException: net.darkhax.tesla.api.implementation.InfiniteTeslaProducerProvider)

Full log please, It may be another mod requiring tesla, neither BC or DE currently use tesla.

Please provide your full log of a crash, this is not an outdated RF api. See #23 for my full response.

It's similar issue to me,I assume.Mine one is RF API not compatible. #23