Technically if you download the right file (the latest dev build) it will be the same, no matter where you download. All those links point you to the same content
The problem was, highly probably, you had an old version like beta4 or beta3 or maybe an older dev build which was released after beta4 but before the env.php switch (like a year ago).
Beta3 and Beta4 was for php7.x
And some dev builds was for php7.4 only
Aprx a year ago maybe 8-9 months ago phpvms become php8 and up compatible only
So in short, always use latest dev build Forum really provides answers to most of possible problems you may have, considering that you are an IT guy, you know that a proper search is your friend And following docs for getting help is also important, "help us to help you back" logic always works.
Glad you solved the problem, next step will be fixing the outgoing mails and for that hosting support (details about your server, ports etc) may be needed.
Have a nice night.