Kindly find a more appropriate list to post this help request. I'd suggest -general.
Kindly do not post images, record the relevant information as text in the body of the email.
There is little to no chance anyone here is going to know why the PGDATA directory disappeared from your machine. While you may get some step-by-step diagnostic type help you may want to consider providing considerably more detail about the specifics of your setup (how you installed it, any file system mount points, etc...) before posting again.
The convention on these lists is to inline or bottom-post (unlike what we are doing right now, which is top-posting). Please try and adhere to that with future communications.
We have setup a Postgresql-11, initially it was working fine but after the restart of the server we are not able to restart the service , it's giving an error message /pg/plsql/11/data is missing or empty .