Failed to open Intel SGX device.

I use these files to run:
```bash
sgx_linux_x64_driver_1.41.bin
sgx_linux_x64_sdk_2.13.100.4.bin
```
but when I run `sgx_linux_x64_driver_1.41.bin `, I get info as follow:
```
Unpacking Intel SGX Driver ... done.
Verifying the integrity of the install package ... done.
Installing Intel SGX Driver ...
/tmp/sgx-driver-7w9vk8 /home/timechainer/wp/run_sgx
install -d /opt/intel/sgxdriver/package
install -d /opt/intel/sgxdriver/scripts
cp -r package/* /opt/intel/sgxdriver/package
install scripts/* /opt/intel/sgxdriver/scripts
/home/timechainer/wp/run_sgx

Creating symlink /var/lib/dkms/sgx/1.41/source ->
/usr/src/sgx-1.41

DKMS: add completed.

Kernel preparation unnecessary for this kernel. Skipping...
```
This is a error?

Finnally, I get error when I run `./app`:
```
# ./app
[get_driver_type /home/sgx/jenkins/linux-ubuntuServer-release-build-trunk-213/build_target/PROD/label/Builder-UbuntuSrv18/label_exp/ubuntu64/linux-trunk-opensource/psw/urts/linux/edmm_utility.cpp:111] Failed to open Intel SGX device.
Info: Please make sure SGX module is enabled in the BIOS, and install SGX driver afterwards.
Error: Invalid SGX device.
Enter a character before exit ...
```
How to fix this errer , I want to mount `/dev/sgx`, but it cant be find.