Create a symbolic link pointing from /usr/local/cuda-10.1/lib64/libcublas.so
to the actual file:
sudo ln -s /usr/local/cuda-10.0/targets/x86_64-linux/lib/libcublas.so /usr/local/cuda-10.1/lib64/libcublas.so
Note: use sudo find / -name "libcublas.so"
to find the correct file.