...
Download the two rel-1.14.0-RC source code bundles (not "installer" files) and unzip/untar them into parallel directories:
https://github.com/vivo-project/Vitro/releases/tag/rel-1.14.0-RC-45
https://github.com/vivo-project/VIVO/releases/tag/rel-1.14.0-RC-45
Step 2: Build and Run
Follow the VIVO installation instructions from the Installing VIVO#PreparingtheInstallationSettings.1 step. If you are testing a clean installation, be sure to supply an empty vivo-dir in your settings.xml file. If you are testing an upgrade, make a copy of your existing VIVO 1.14 vivo-dir directory and supply the location of that copy as the value of vivo-dir in your settings.xml file.
...
You can test release candidate on the demo site, provided by TIB https://vivo.tib.eu/vivorc (and https://vivo.tib.eu/vitrorc for Vitro).
To log in to the demo site, you can request credentials from Dragan Ivanovic, Georgy Litvinov or Christian Hauschke on the VIVO Slack channel.
...