The link you followed will bring you to this page:

https://appalti.regione.sicilia.it/PortaleAppalti/it/ppgare_bandi_lista.wp?actionPath=/ExtStr2/do/FrontEnd/Bandi/view.action&currentFrame=7&codice=G00510&_csrf=MMD87EE2MP9FR1MTM14LV2HSM89MSHRX