Grand Arena Championship Crash and Sign up Issues

Product: Star Wars: Galaxy of Heroes
Platform:Apple iPhone 8
What type of device are you experiencing the issue with? Iphone
OS Version iOS 12
Ally Code: (Find it here: http://bit.ly/AllyCode ) 243782767
What type of issue do you have? Gameplay
How often does the bug occur? Often (50% - 99%)
Summarize your bug I modified me mods , up gear characters 1 hours before starting but sign up not registered at grand arena championship ...I click on participate yet

Steps: How can we find the bug ourselves? Check your log or your code for find why that is not good
Connection Type Wifi
Please select your region Europe
Country France