Read the Failure First
A failed patch run is a message, not a mystery. Expert mode shows a log, and the log names the step that failed. A run that skips patches is different from a run that crashes, and a run that finishes but will not install is different again. Read which one happened before changing anything, because each failure has its own fix. This page is part of the Morphe APK download patching collection.
Skipped patches point to the target app file version. A crash points to memory, storage or a patch that does not fit the file. An install failure points to a signature clash with an older patched copy. Naming the failure first saves every fix that follows.
Fixes in Order
First, match the target app file to a version the patch bundle supports, and patch again. Second, free storage and close heavy apps, then patch again, because patching needs room for the original file, the working copy and the finished file. Third, reload the patch source, because a source that failed to load produces an empty or stale patch list that cannot patch anything well.
Fourth, drop to Simple mode for one run. If Simple mode patches cleanly while Expert mode fails, one Expert patch choice is the culprit, and switching patches off one group at a time finds it. Fifth, restart the phone once before declaring the patcher broken, because a stuck installer service can block an otherwise clean run.
For the next step, see Morphe App Not Installed Error: Fix It in the guides, which continues this setup from where this page leaves off.
When to Start Clean
Start clean when two full runs fail the same way after the file, storage and source checks. Remove the patched copy, remove saved original files for that target, re-add the patch source, and patch once in Simple mode. A clean run that succeeds proves the patcher works, and the patch choices can be rebuilt from there.
Keep notes on what failed and what fixed it. Patching problems repeat, and a one line note about the file version that worked saves the next patch run from repeating the same search.
Related reading: Morphe Ad Block and Background Playback, which covers the neighbouring part of this workflow.
When you are ready, check the download page for the current file status.
Conclusion
Read the failure, match the file, free storage, reload the source, and test Simple mode before starting clean. Most failed runs end at step one, because the file version was wrong.