Good morning Paul.
I am writing you a memo hoping it will be useful on the subject.
Unfortunately, even if it indicates that the Medical package installation was successful, a message also appeared
(in yellow):
JFolder:: files: The path is not a folder. Path: / home / ifzdwdts / public_html / elixu / administrator / components / com_spmedical / sql / updates / mysql
I did some tests and found two interesting things:
1) The problem I don't think concerns Joomla and recent versions. I tried on a clean site with both Joomla 3.9.18 and the latest current one (Joomla 3.9.20). The problem (blank screen on the site typing the home page path from the frontend or / and pressing the SP Builder preview page button) after installing the Medical package happens in both situations.
2) I found by ftp the file (Medical package installed) that conflicts with everything else.
The file is: … /administrator/components/com_spmedical/router.php
In fact, if I remove (or temporarily rename) this file everything returns to work as before the installation.
I hope that these considerations of mine are useful to solve the problem inside the Medical package, which would be very useful for me to be able to use it working in my site created with Helix Ultimate, as mentioned in the previous message.
Best regards
Marco