The question is formulated incorrectly. What does "create" mean? From scratch or based on other language (s)? How much vocabulary? For what purposes? ..
Many have already tried to create a "new" language, but none have caught on.
The question can be viewed from a different angle: is it possible to create a language, devoid of the many disadvantages of natural languages? That is, completely built on a logical basis.
Maybe one. Such, for example, as John Ronald Ruel Tolkien, who created not even one, but at least a couple of dozen languages, each with its own phonetics, grammar and vocabulary (with varying degrees of detail, of course). The most famous of these are certainly Quenya , Sindarin , Khuzdul and Dark Speech .
Or, for example, Mark Okrand, who created and designed in great detail the Klingon language (very developed and quite popular and widely used, even having its own Wikipedia, a separate institute and a quarterly magazine).
Well, and a textbook example is Esperanto, created by the oculist Lazar Zamenhof. At the moment, the number of native speakers is estimated at 1.5-2 million.
The next question is how much the new language will take root and spread.