The Pokémon Sleep team has acknowledged two newly discovered issues affecting the game following the version 3.7.0 update. One bug causes display problems on the “A New Week” screen, when moving between sites, and within Cyan Beach (Expert) and Expert bonuses, though it does not affect gameplay progression and will be fixed in a future update. Separately, the developers are investigating Error Code 000500, which can prevent the game from progressing under certain conditions. As compensation for the inconvenience, all players have been sent 500 Sleep Points via their in-game Gift Box.
Source: Official Pokémon Sleep news