Clear PixelLab cache: Settings → Apps → PixelLab → Storage → Clear Cache. Then restart your phone.
: Check your phone settings to ensure PixelLab has "All Files" access. On many Android devices, navigate to Settings > Apps > PixelLab > Permissions and enable full storage access. How to Import Zaman Edit Work
When a designer creates a PLP file, they might intentionally merge all layers into a single group and lock it. This is not a bug but a protection feature.