(1) Please find if libnsl is installed. Use the following commands:
# ls -al /usr/lib64/libnsl.so.1
# ls -al /usr/lib64/libnsl.so.2
# find / -name libnsl* -print
(2) You have two possible solutions:
(2a) Recommended. If you have libnsl.so.2, then create a symbolic link to it:
# ln -s /usr/lib64/libnsl.so.2 /usr/lib64/libnsl.so.1
# ls -al /usr/lib64/libnsl.so.1
# ls -al /usr/lib64/libnsl.so.2
(2b) Second solution would be install libnsl.so.1
However, is recommended to try (2a) first.