Perhaps you haven't completed all the side objectives or requirements for a particular main story mission. Go back and review the mission details carefully. It's also possible that there's a conflict with a mod if you're using any. Try disabling them to see if the story can then progress.
First, check if there are any software updates for the game. Sometimes, bugs that prevent story progression are fixed in updates. Also, make sure your game save isn't corrupted. Try loading an earlier save if possible.
Maybe it lacks certain key elements or plot devices. It could be that the character is not developed enough to drive the story forward, or there are external constraints in the narrative structure preventing its progress.
It could be that you're missing an important item or haven't interacted with a key character. Sometimes, it's a matter of exploring all areas thoroughly. Also, make sure you haven't overlooked any instructions or dialogues.
Maybe it has some bugs or glitches that prevent the story from progressing. It could also be due to incomplete coding in certain parts related to story advancement.
It could be a glitch in the game. Try restarting the game or reinstalling it to see if that fixes the issue. Also, make sure your game is updated to the latest version.
Check for any available updates for the game. The developers might have released patches to fix issues like this. If there are updates, install them and see if the story can then be advanced. Another option is to verify the integrity of the game files. This can be done through the game platform (like Steam). If some files are corrupted, this process will replace them with the correct ones, which might solve the problem.
It might be due to incorrect save file corruption. If the save file has some issues, it can disrupt the normal flow of the story. Also, sometimes in complex games like Zero Time Dilemma, the game's internal logic can get confused. Maybe you triggered something out of order, like trying to access a part of the story that should be unlocked later before fulfilling certain conditions.
First, try restarting the game. It might be a simple glitch that can be fixed with a fresh start. Also, check for any available updates for the game. Developers often release patches to fix bugs that could be causing the story to not advance.
If the ticket snatching 15 days in advance did not succeed, the following methods could be tried. First, they could choose to buy tickets on standby. On the railway 12306 app, you can click "Check the ticket". If there are no more tickets for the required train number and seat, the system will directly display the words "standby", and you can choose to buy tickets on standby. Secondly, he could consider buying a ticket. If you can't buy a direct ticket, you can buy a joint ticket by taking a split ride to meet your travel needs. In addition, you can also try to buy an extra ticket forward or backward. You can search for the bus stop by stop to see if there are tickets available. In addition, you can try to transfer to buy tickets. Choose a transit city and see if there are any tickets available. If none of the above methods worked, they could consider adjusting their travel plans and setting off a few days earlier or later. In short, if the ticket snatching 15 days in advance did not succeed, they could try the above methods to solve the problem.