You have no reputation events for the time shown.
According to your screenshots, the current "Week" view currently shows December 4th to December 5th. You earned no reputation for those two days on that site, so you aren't listed in the league. You did earn reputation December 3rd, so you do show up for the month tab.
Through digging, I see that users showing as "0 reputation" for a period in the league do have reputation activities recorded, however they even out to 0. On Stack Overflow, I appear on neither the Month nor Week tabs, as I have no reputation events there.
Once the league updates with today's reputation gain, you'll be able to find yourself in the league list just fine.