macOS Installation stuck due to Missing content download on Fujitsu Celsius H770 Hackintosh

Hello everyone, I have an issue with setting up my Hackintosh on a Fujitsu Celsius H770. Basically, when I reach the installation stage for macOS (I'm using Sonoma instead of Sequoia, as I wanted to use the Airportitlwm kext, which isn't yet supported on the latest macOS), the first error I encountered was that the installation wouldn't even start; it would freeze at "Loading Information...". I managed to "unlock" it and move forward by changing the date from the terminal, as suggested in an online post I found. Now I'm facing another error, which appears immediately after the first one, saying: "Installation of macOS could not continue. Installation requires downloading important content. That content can't be downloaded at this time. Try again later." Could anyone help me with this? Here's a photo and my computer specs: Fujitsu Celsius H770 CPU: Intel Xeon E3-1505M v6 Network: Intel Dual Band Wireless AC 8265 | Intel Ethernet Connection 1219-LM GPU: Intel HD Graphics P630 | Nvidia Quadro M2200 RAM: 32GB 2400MHz SSD: Sam MZVLB512HAJQ-00007