The TRP Sieve project has come to an end, and work generation for that subproject has stopped. While there will be a few recycled tasks available for a short time, eventually they will all be gone.
If TRP-Sieve is the only PrimeGrid subproject you're running, you should select another of our subprojects to run. We suggest GCW-Sieve. It's very similar to TRP-Sieve.
Since TRP-Sieve previously was automatically assigned to new users, if you've never explicitly selected which subproject to run, there's a good chance your computer is currently configured to TRP-Sieve. Please go to the PrimeGrid preferences page to change your preferences.
For discussion and more information, please see this forum thread.
My lucky number is 75898524288+1
(I am NOT an administrator anymore, so please don't PM me with questions. I can't help.)