Here is the latest news from PSR Tutorial:

Quote from https://www.psrtutorial.com/

Note:
FORUM update:
Our forum software in not compatible with the most recent server upgrade; therefore, we are closing the forum. Thanks to each and every member who has contributed to this great resource over the last 21 years. We wish all of you well with your future endeavors. Our best regards, -- Roger Brenizer (PSR Tutorial Forum Administrator) and Joe Waters (PSR Tutorial Administrator).

Note also, that while this main web site (psrtutorial.com) is still operational, it will be retired some time later this year. I'm afraid this admin is getting too old and worn out to keep it alive. -- Joe

Too bad that a sever update should be the reason to close down a great forum and that the PSR Tut mainsite is planned to be closed down as well.