Thank you alex. I did indeed research and I already know the meaning of error 7. I thought maybe someone can confirm above mentioned files are working or maybe an older twrp version is working. I already tried different files from lineageos.
Updater script does look like this:
assert(getprop("ro.product.device") == "FP2" || getprop("ro.build.product") == "FP2" || abort("E3004: This package is for device: FP2; this device is " + getprop("ro.product.device") + "."););
ui_print("Target: Fairphone/FP2/FP2:6.0.1/FP2-gms-18.04.1/FP2-gms-18.04.1:user/release-keys");
package_extract_dir("install", "/tmp/install");
set_metadata_recursive("/tmp/install", "uid", 0, "gid", 0, "dmode", 0755, "fmode", 0644);
set_metadata_recursive("/tmp/install/bin", "uid", 0, "gid", 0, "dmode", 0755, "fmode", 0755);
run_program("/tmp/install/bin/backuptool.sh", "backup", "/dev/block/platform/msm_sdcc.1/by-name/system", "ext4");
ui_print("Patching system image unconditionally...");
show_progress(0.900000, 0);
block_image_update("/dev/block/platform/msm_sdcc.1/by-name/system", package_extract_file("system.transfer.list"), "system.new.dat.br", "system.patch.dat") ||
abort("E1001: Failed to update system image.");
show_progress(0.020000, 10);
run_program("/tmp/install/bin/backuptool.sh", "restore", "/dev/block/platform/msm_sdcc.1/by-name/system", "ext4");
package_extract_file("boot.img", "/dev/block/platform/msm_sdcc.1/by-name/boot");
show_progress(0.100000, 10);
set_progress(1.000000);
I am not sure how to edit the file. Is it enough to comment out assert line?
Donāt do things you donāt understand, or ask questions about them before, particularly from internet links