This linked page (https://docs.cesm.ucar.edu/models/cesm2/verification/) titled "Verifying the port of CESM2 to a new machine" on the CESM2 homepage (Community Earth System Model 2 (CESM2) | Community Earth System Model) is not working, showing a "Software Error" page instead.
Software error:
Can't locate Net/WebSocket/Server.pm in @INC (you may need to install the Net::WebSocket::Server module) (@INC contains: /usr/local/lib64/perl5 /usr/local/share/perl5 /usr/lib64/perl5/vendor_perl /usr/share/perl5/vendor_perl /usr/lib64/perl5 /usr/share/perl5) at /home/www/html/docs/models/cesm2/verification/index.pl line 53.
BEGIN failed--compilation aborted at /home/www/html/docs/models/cesm2/verification/index.pl line 53.
For help, please send mail to the webmaster (root@localhost), giving this error message and the time and date of the error.