It seems like Yik Yak isn't accepting the user ID's as it's returning an error message that you can only see when you try to view your own posts as shown below

However I tried using the test ID that was posted in a previous issue thread (B6C52E0EA41CBD9D4A1FA7D65C60AA4D) and that ID worked without any issue
It seems like Yik Yak isn't accepting the user ID's as it's returning an error message that you can only see when you try to view your own posts as shown below

However I tried using the test ID that was posted in a previous issue thread (B6C52E0EA41CBD9D4A1FA7D65C60AA4D) and that ID worked without any issue