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.
Please do not PM me with support questions. They will usually go unanswered. Ask on the forums instead. Thank you!