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Do you have any antivirus or taskiller app? have you disabled any app/service?
Uninstall it > restart your phone > check again
you can also boot on safe mode
what if you uninstall photo editor's updates > restart your phone > re-update the app
settings > apps > all > photo editor
Try settings > apps > all > album > uninstall updates > also photo editor clear data > restart your phone, check again