Tor Browser doesn't respond in KVM

I am not a programmer and English is not my birth language; but I try to do my best. Please try to be patient. Thank you.

I have been using Whonix in Virtual Box for the last few months, but I considered it necessary to switch to KVM and it is my first time installing it in KVM. With difficulties I was able to run it in the Virt-Manager, the problem is that when I start Tor Browser on the Workstation it opens, but it doesn’t seem to work. Tor Browser opens the interface but it keeps loads and never ends up responding. While the entire operating system works normally, Tor Brouser “works” is extremely slow, the Whonix welcome page never ends to load, and it is so slow that it doesn’t even let me access the Tor Browser settings. I tried using the Tor Browser Downloader that comes on the Workstation, but it gives an error. I also tried to update it from the terminal, and when the process finished, it gave some errors and then it opened and remained the same.

I’m on Fedora 43 kde plasma and I’m trying to run the new Whonix 18.0.8.7. I would appreciate it if you could help me, given that, due to my situation, Whonix has become an indispensable tool.

Low RAM issue? Try:

I just tried and there wasn’t much progress. I gave the Workstarion 8 GB of RAM and 4 CPU cores, while I gave the Gateway 3 GB of RAM and 2 CPU cores (I think my PC wouldn’t support giving it more). I could see that it does load, but it loads extremely slowly; and I realized this because I removed the Welcome tab from Whonix and tried to enter Brave Search and I succeed, but it takes over 30 minutes to load Brave Search, making it practically unusable.

That makes me think that I don’t have the internet configured correctly in Whonix KVM. I tried to enter the Tor Browser in other ways outside Whonix KVM (the browser in my host machine, other PCs, in the VirtualBox whonix, and even the cell phone) and in all of them it responded quite quickly; so I highly doubt it is my internet connection. Also, when I updating the repository and downloading the updates through the sysmaint terminal it works fine, but the Tor Browser it is impossible to use.

I do not know what I can do ):

Try Testing with a Debian VM.