The other party Tik Tok didn't open the private message to remind you what was going on.

The other party Tik Tok did not open the private message reminder for the following reasons:

1. setting problem: the other party may have turned off the private message reminder function in the setting of Tik Tok. In Tik Tok's personal settings, there is an option of "message notification" or "privacy settings", which may include the setting option of private message reminder. If the other party turns off the private message reminder, then you won't receive any private message reminder notice.

2. Message filtering: The other party may exclude private messages from the message filtering of strangers or friends. Tik Tok provides some filtering mechanisms that can automatically classify messages from strangers or friends into "message request" or "other" folders. If the other party sets the private message filtering to automatic classification or ignore, then you will not receive a private message reminder.

3. Network or system problems: Sometimes, Tik Tok's private message reminding function may be affected by network connection or system problems. If the other party's network connection is unstable or the application of Tik Tok fails, the private message reminder may not work normally.

For this problem, I suggest that the other party first check the setting of Tik Tok to ensure that the private message reminder function is turned on. If there is nothing wrong with the settings, you can try to log in to Tik Tok again, or uninstall and reinstall the application to solve possible network or system problems. At the same time, you can also suggest that the other party contact Tik Tok's customer service team for their help and guidance.

Extended content: Private message reminder function is very important in social media applications, which can inform users of new messages in time and remind users to reply. However, sometimes private message reminders may not work properly due to personal settings, network problems or application failures. When using social media applications, we should pay attention to check and adjust the relevant settings to ensure the normal operation of the private message reminder function, so as to reply and handle important messages in time.