I Blackwell

I have a fresh LAMP system, with SSL enabled in apache2 using the (default) snakeoil certificate. I have been heretofore able to reliably access the system via xrdp. Today I replaced the snakeoil certificate with a Let's Encrypt certificate using certbot. That was the only change I made. Immediately thereafter, any xrdp session I try to initiate crashes a minute or two after authentication. Specifically, the client window just disappears. Having been summarily booted out by xrdp, I am unable to access...