smada's solution worked, but he confused the ln order. This should work:
sudo mv /usr/lib/nvidia-375/libEGL.so.1 /usr/lib/nvidia-375/libEGL.so.1.org sudo mv /usr/lib32/nvidia-375/libEGL.so.1 /usr/lib32/nvidia-375/libEGL.so.1.org sudo ln -s /usr/lib/nvidia-375/libEGL.so.375.39 /usr/lib/nvidia-375/libEGL.so.1 sudo ln -s /usr/lib32/nvidia-375/libEGL.so.375.39 /usr/lib32/nvidia-375/libEGL.so.1
Rebooted afterwards, then the problem was solved an Steam started again.
smada's solution worked, but he confused the ln order. This should work:
sudo mv /usr/lib/ nvidia- 375/libEGL. so.1 /usr/lib/ nvidia- 375/libEGL. so.1.org nvidia- 375/libEGL. so.1 /usr/lib32/ nvidia- 375/libEGL. so.1.org nvidia- 375/libEGL. so.375. 39 /usr/lib/ nvidia- 375/libEGL. so.1 nvidia- 375/libEGL. so.375. 39 /usr/lib32/ nvidia- 375/libEGL. so.1
sudo mv /usr/lib32/
sudo ln -s /usr/lib/
sudo ln -s /usr/lib32/
Rebooted afterwards, then the problem was solved an Steam started again.