The server does not support version 7.4 of the PHP Project specification

[zulus]

Message from mailing list:

I was exploring PDT's built-in server running features because I usually
run at least one or two instances of a built-in server, whether it's the
one started by Laravel's artisan serve command or the PHP
command-line's one via -S. However, after configuring my runtime
based on the PHP executable that comes with Fedora (PHP 7.4.6) I got the
following message when I attempted to add a new server:

"The server does not support version 7.4 of the PHP Project specification."

Someone had this same error message about one month ago and posted on
the Eclipse subreddit (found via searching):

https://www.reddit.com/r/eclipse/comments/gcobmx/the_server_does_not_support_version_74_of_the_php/