I've a laptop running mint. At some point in the next few days I'll upload the certificate and try a test run.
But i also have the same issue trying to access it on my Android phone... 🤔
Discussion
i had problems with Start9 (connected via wifi) until i moved it right next to the router.
then i tried FreeGPT on the old Dell Optiplex, and it ground to a halt again, so i've deleted all but the basics (including Mempool).