Nagios – Stuck at Update in Progress

The best way to handle this issue to download the source code and install it from the command line:

1. Download the source code:
   wget https://assets.nagios.com/downloads/nagiosxi/5/xi-5.7.4.tar.gz
2. Extract the files, navigate to the folder and run the update script:
   tar -xvf xi-5.7.4.tar
   cd nagiosxi
   ./upgrade