ERROR:Failed to generate meta-plnx layer

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Check: https://forums.xilinx.com/t5/Embedded-Linux/Petalinx-2019-1-Failed-to-generate-meta-plnx-generated-layer/td-p/1002805

As I suggested in previous post, you should work in the 160GB workspace folder, not in /pynq (a small shared folder). So build your image inside /workspace.