Thank you for your post and welcome!
I'm sorry to hear of the issues you seem to be experiencing with iTunes on your iPad.
Are you able to play music from a different device?
Are you able to play other sources?
I look forward to hearing from you!
Have you been able to play from your iTunes library using your iPad in the past? It's likely because the iTunes library is local to your computer and therefore can be accessed through the computer SoundTouch app. Whereas, on your iPad, you do not have the same direct access to your iTunes files.
However, if you've been able to play your iTunes library using your iPad, let me know and we can look into things further.
Thanks for confirming that Dumpling!
When you are trying to access the library while on your iPad, is your computer turned on? With the iTunes library in the SoundTouch app, it does read the information from your computer, if your computer is off or in standby/sleep mode, it won't be able to access the files it needs to play the music. You will need to have your computer on to be able to access the music while on your iPad.
If you can make sure your computer is turned on, and try accessing the library on your iPad then you will be able to play from the music library!
I hope this helps!