I can see that it looks like the system is unable to reach these packages that don't exist on the source server(s) but ... trying to change to different ones in the Updating Settings GUI doesn't seem to actually change them.
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/glibc/libc6_2.37-0ubuntu2.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gcc-13/gcc-13-base_13.1.0-2ubuntu2%7e23.04_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gcc-13/libgcc-s1_13.1.0-2ubuntu2%7e23.04_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/o/openssl/libssl3_3.0.8-1ubuntu1.2_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gcc-13/libstdc%2b%2b6_13.1.0-2ubuntu2%7e23.04_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libw/libwebp/libwebp7_1.2.4-0.1ubuntu0.23.04.2_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/t/tiff/libtiff6_4.5.0-5ubuntu1.2_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/f/freetype/libfreetype6_2.12.1%2bdfsg-4ubuntu0.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libx/libx11/libx11-6_1.8.4-2ubuntu0.3_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libx/libx11/libx11-xcb1_1.8.4-2ubuntu0.3_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libx/libxpm/libxpm4_3.5.12-1.1ubuntu0.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libc/libcap2/libcap2_2.66-3ubuntu2.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libs/libssh/libssh-4_0.10.4-2ubuntu0.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/n/ncurses/libncurses6_6.4-2ubuntu0.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/n/ncurses/libncursesw6_6.4-2ubuntu0.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/n/ncurses/libtinfo6_6.4-2ubuntu0.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libx/libxml2/libxml2_2.9.14%2bdfsg-1.1ubuntu0.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/a/avahi/libavahi-client3_0.8-6ubuntu1.23.04.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/a/avahi/libavahi-common3_0.8-6ubuntu1.23.04.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/a/avahi/libavahi-common-data_0.8-6ubuntu1.23.04.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gcc-13/libgomp1_13.1.0-2ubuntu2%7e23.04_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/s/speexdsp/libspeexdsp1_1.2.1-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gcc-13/libatomic1_13.1.0-2ubuntu2%7e23.04_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/l/llvm-toolchain-15/libllvm15_15.0.7-3ubuntu0.23.04.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gcc-12/gcc-12-base_12.3.0-1ubuntu1%7e23.04_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gst-plugins-base1.0/libgstreamer-plugins-base1.0-0_1.22.1-1ubuntu1.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/c/cups/libcups2_2.4.2-3ubuntu2.5_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/s/svt-av1/libsvtav1enc1_1.4.1%2bdfsg-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/libv/libva/libva-drm2_2.17.0-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/libv/libva/libva-x11-2_2.17.0-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/libv/libva/libva2_2.17.0-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/o/ocl-icd/ocl-icd-libopencl1_2.3.1-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/f/ffmpeg/libavcodec59_5.1.2-3ubuntu1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/f/ffmpeg/libswresample4_5.1.2-3ubuntu1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libw/libwebp/libwebpmux3_1.2.4-0.1ubuntu0.23.04.2_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/a/aom/libaom3_3.6.0-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/libg/libgsm/libgsm1_1.0.22-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libr/librsvg/librsvg2-common_2.54.5%2bdfsg-1ubuntu2.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libr/librsvg/librsvg2-2_2.54.5%2bdfsg-1ubuntu2.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/libv/libvpx/libvpx7_1.12.0-1ubuntu1.2_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/z/zvbi/libzvbi0_0.2.41-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/f/ffmpeg/libavutil57_5.1.2-3ubuntu1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/c/curl/libcurl4_7.88.1-8ubuntu2.3_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gst-plugins-base1.0/gstreamer1.0-plugins-base_1.22.1-1ubuntu1.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gst-plugins-good1.0/gstreamer1.0-plugins-good_1.22.1-1ubuntu1.2_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gst-plugins-good1.0/libgstreamer-plugins-good1.0-0_1.22.1-1ubuntu1.2_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/main/g/gst-plugins-base1.0/gstreamer1.0-x_1.22.1-1ubuntu1.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/w/wine/libwine_8.0%7erepack-4_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/w/wine/wine32_8.0%7erepack-4_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/i/intel-gmmlib/libigdgmm12_22.3.4%2bds1-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/i/intel-media-driver/intel-media-va-driver_23.1.2%2bdfsg1-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch http://mirror.isoc.org.il/pub/ubuntu/pool/restricted/n/nvidia-graphics-drivers-525/libnvidia-compute-525_525.125.06-0ubuntu0.23.04.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/m/mesa/mesa-va-drivers_23.0.4-0ubuntu1%7e23.04.1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Failed to fetch https://mirror.isoc.org.il/pub/ubuntu/pool/universe/libv/libva/va-driver-all_2.17.0-1_i386.deb 404 Not Found [IP: 192.115.2.70 443]
Any help appreciated!
