When importing an app in the Qlik Sense Management console one of the following errors are displayed:
Failed to import app. Please check the log file
Error: Request Entity Too Large

The Engine logs will report:
Command=Import app;Result=413;ResultText=Error: Request Entity Too Large
Log path:
C:\ProgramData\Qlik\Sense\Log\Repository\Trace\SERVERNAME_System_Repository.txt
C:\ProgramData\Qlik\Sense\Log\Engine\trace\SERVERNAME_System_Engine.txt
Environment:
Qlik Sense Enterprise on Windows
Cause:
App too large or data in the app corrupted.
Resolution:
Verify disk space available
Is sufficient disk space available on the drive? 2 times the size of the app is required on the central node.
Open the app without data
- Useing Qlik Sense Desktop, copy 'the .qvf/app' to
C:\Users\YOURUSERNAME\Documents\Qlik\Sense\Apps
- Right-click on 'the .qvf/app' from QlikSense Desktop and choose 'Open without data'
- Save the app with a new name and import it to QlikSense QMC
- Reload data to new app in QMC
See related article Troubleshooting Corrupt Qlik Sense App (QVF) File