In fact, I just checked; I stand corrected (actually lounging)! There is a trick of curl/HTML going on there and the command
should work.

I think that you may have missed a step:
[Sun 31 May 15:56:38 BST 2020] Installing to /home/user/.acme.sh
[Sun 31 May 15:56:38 BST 2020] Installed to /home/user/.acme.sh/acme.sh
[Sun 31 May 15:56:38 BST 2020] Installing alias to '/home/user/.profile'
[Sun 31 May 15:56:38 BST 2020] OK, Close and reopen your terminal to start using acme.sh
[Sun 31 May 15:56:38 BST 2020] Installing cron job
[Sun 31 May 15:56:38 BST 2020] Installing to /home/user/.acme.sh
[Sun 31 May 15:56:38 BST 2020] Installed to /home/user/.acme.sh/acme.sh
[Sun 31 May 15:56:38 BST 2020] Installing alias to '/home/user/.profile'
[Sun 31 May 15:56:38 BST 2020] OK, Close and reopen your terminal to start using acme.sh
[Sun 31 May 15:56:38 BST 2020] Installing cron job
Alternatively, in Step 3:
~/.acme.sh/acme.sh --issue -d your_domain.tld -d *.your_domain.tld --dns --force
P.S. don't bash @rcschaff as he does his best to help all and sundry, with as many/more typos as/than me.