If it is a external SSD, they are unfortunately prone to this issue as well. If it is internal, usually clearing Squad cache will fix it but like I said *usually*. There are some cases where the mod fails load up properly on a internal SSD due to Squad unfortunately being a complete mess for mods.
If anything restart your PC, clear download cache, and make sure you aren't running 3rd party programs like Armorcrate, Razer Synapse, any RGB Programs etc. OWI has stated these sometimes cause issues when loading the mod and recommend disabling them. But as for us as a mod, not much we can do other than give ya some tips to attempt like in the other discussion page.

In my case, i used to get the infinite loading screen. One way i "fix" it is clearing the game's cache when i initially first run squad. When i run it a 2nd time, i set it to full screen and enter the GAL server. This method is a bit odd and slightly time consuming, but it hasn't done me wrong yet. This also applies to other mods such as middle east escalation. Hope this somewhat helps