Error when compiling luci-app-bypass from openwrt sdk

4_gcc-8.4.0_musl.Linux-x86_64/staging_dir/target-x86_64_musl/packages/gmp.list && cp -fpR /home/isso/Downloads/openwrt-sdk-21.02.1-x86-64_gcc-8.4.0_musl.Linux-x86_64/tmp/stage-gmp/* /home/isso/Downloads/openwrt-sdk-21.02.1-x86-64_gcc-8.4.0_musl.Linux-x86_64/staging_dir/target-x86_64_musl/; '; fi
rm -rf /home/isso/Downloads/openwrt-sdk-21.02.1-x86-64_gcc-8.4.0_musl.Linux-x86_64/tmp/stage-gmp
touch /home/isso/Downloads/openwrt-sdk-21.02.1-x86-64_gcc-8.4.0_musl.Linux-x86_64/staging_dir/target-x86_64_musl/stamp/.gmp_installed
touch -r /home/isso/Downloads/openwrt-sdk-21.02.1-x86-64_gcc-8.4.0_musl.Linux-x86_64/build_dir/target-x86_64_musl/gmp-6.2.1/.built /home/isso/Downloads/openwrt-sdk-21.02.1-x86-64_gcc-8.4.0_musl.Linux-x86_64/build_dir/target-x86_64_musl/gmp-6.2.1/.autoremove 
2>/dev/null >/dev/null
find /home/isso/Downloads/openwrt-sdk-21.02.1-x86-64_gcc-8.4.0_musl.Linux-x86_64/build_dir/target-x86_64_musl/gmp-6.2.1 -mindepth 1 -maxdepth 1 -not '(' -type f -and -name '.*' -and -size 0 ')' -and -not -name '.pkgdir' | xargs -r rm -rf
make[2]: Leaving directory '/home/isso/Downloads/openwrt-sdk-21.02.1-x86-64_gcc-8.4.0_musl.Linux-x86_64/feeds/base/package/libs/gmp'
time: package/feeds/base/gmp/compile#129.43#39.14#109.05
make[1]: Leaving directory '/home/isso/Downloads/openwrt-sdk-21.02.1-x86-64_gcc-8.4.0_musl.Linux-x86_64'
make: *** [/home/isso/Downloads/openwrt-sdk-21.02.1-x86-64_gcc-8.4.0_musl.Linux-x86_64/include/toplevel.mk:223: package/luci-app-bypass/compile] Error 2