Yep, Line 6 problem from the start.  They knew about this in Beta For IOS  13,,,I use my ipad for 1 thing...MUSIC .  Now I can't...I registered every line 6 product I own...Yes, c'mon , register your product.  Give all your information.  But when a critical update will cripple your Line 6 DEVICE,  your on your own with no warning!  You have my email, serial numbers from products that I own,   how about,   *Hey Sonic Port Owners...Don't update your IOS because we know your device will not be compatible".....I could have lived with Apple 12.4 .  Didn't need Apple IOS 13. Now almost 4 weeks ....with a sonic port used for a  paper weight.  I have purchased about 5 to 6 guitar Apps from Itunes that CAN NOT BE USED because I have a non working guitar interface. Sorry to vent my frustration here....Thanks for listening...