Fiddler is a free tool that supports debugging HTTP(S) traffic and monitoring incoming and outgoing network traffic.
Check more information on Fiddler from KB20064: How to install and use Fiddler for MicroStrategy Web troubleshooting.
To capture HTTP traffic from mobile app,
for ios device, refer to KB307046: How to use Fiddler to troubleshoot connectivity issues for HTTPS traffic on Mobile devices;
for Android device, refer to KB44336: How to use Fiddler along with Proxydroid to troubleshoot connectivity issues on Android devices.
To capture HTTPS traffic from mobile app, more steps need to be performed.
Below is the step-by-step guidance:


After the setup, it would record the requests one-by-one as shown below:

Reproduce the error in mobile device. Select all records and right click to save selected sessions as ArchiveZIP. KB307046