build ubuntu 20 on VIM4

[tiralonghipol]

Hi I succesfully generated a vim4-ubuntu-20.04-minimal-linux-5.4-fenix-1.0.11-220609-emmc-develop.raw.img

but at the moment of flashing it on my VIM4, I get the following error:

Burning image '/home/pol/repos/khadas/fenix/build/images/vim4-ubuntu-20.04-minimal-linux-5.4-fenix-1.0.11-220609-emmc-develop.raw.img' for 'VIM4' to eMMC...
next try index 3, current opt arg /home/pol/repos/khadas/fenix/build/images/vim4-ubuntu-20.04-minimal-linux-5.4-fenix-1.0.11-220609-emmc-develop.raw.img
MSG[TLS]pkg path /home/pol/repos/khadas/fenix/build/images/vim4-ubuntu-20.04-minimal-linux-5.4-fenix-1.0.11-220609-emmc-develop.raw.img
MSG[TLS]exe run path:/home/pol/repos/khadas/utils/aml-flash-tool/tools/adnl
MSG[FLW]Aml_flow_init version V1.1-trunk Nov  1 2019!
MSG[FLW]Tooltype 3
DBG[FLW]ok in load lib AmlImagePack.so
MSG[FLW]OK leave Aml_flow_init

ERR[FLW]f(lua_res_release)L134:lua_res_release!
[ERR]f(AmlImagePack.cpp)L150:Err aml pkg magic 0x5085db4e
[ERR]f(aml_img_api_4_dll.cpp)L36:Fail in open img[/home/pol/repos/khadas/fenix/build/images/vim4-ubuntu-20.04-minimal-linux-5.4-fenix-1.0.11-220609-emmc-develop.raw.img]
ERR[FLW]f(usb_flow_img_load)L71:Fail in open img[/home/pol/repos/khadas/fenix/build/images/vim4-ubuntu-20.04-minimal-linux-5.4-fenix-1.0.11-220609-emmc-develop.raw.img]
ERR[FLW]f(Aml_Image_load)L176:Fail in read item from img, ret -72
ERR[TLS]f(main.cpp)L199:Fail in load img

any help??