On modern devices, you can increase the amount of random access memory (RAM) at the expense of the built-in memory. Go to Device Settings > About Device > RAM
Enable RAM Expansion (if available) and select the maximum possible expansion limit on the scale. Confirm the restart of the device
You can disable or uninstall unused applications to increase the inbuilt memory and RAM. Open Device Settings > Apps > App Management
If EasyMerch hangs or closes spontaneously, do not launch other applications at the same time as it. To close other applications, tap Recently used applications and swipe all except EasyMerch
Uninstall EasyMerch to clear the application cache and data. Before doing so, unload all reports from the queue. Click the EasyMerch icon > Uninstall. Reinstall it
To prevent the application from restarting spontaneously and to ensure that the queue is unloaded even if EasyMerch is minimised open Device Settings > Apps > App Management > EasyMerch > Battery usage. Make sure that "Allow foreground activity" and "Allow background activity" are enabled (if any)