We’re about 5 levels of debugging deep here, but: the forum should accept screenshots. What kind of file are you attaching (PNG?) and what error do you see when you try to?
May 25 05:29:48 endless kernel: SQUASHFS error: zlib decompression failed, data probably corrupt
May 25 05:29:48 endless kernel: SQUASHFS error: Failed to read block 0x114becf1e: -5
May 25 05:29:48 endless kernel: SQUASHFS error: zlib decompression failed, data probably corrupt
May 25 05:29:48 endless kernel: SQUASHFS error: Failed to read block 0x114becf1e: -5
May 25 05:29:48 endless kernel: I/O error, dev loop1, sector 10400768 op 0x0:(READ) flags 0x80700 phys_seg 53 prio class 2
May 25 05:29:48 endless kernel: SQUASHFS error: zlib decompression failed, data probably corrupt
May 25 05:29:48 endless kernel: SQUASHFS error: Failed to read block 0x114becf1e: -5
May 25 05:29:48 endless kernel: I/O error, dev loop1, sector 10401792 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
May 25 05:29:48 endless kernel: Buffer I/O error on dev loop1, logical block 5200896, async page read
May 25 05:29:48 endless kernel: SQUASHFS error: zlib decompression failed, data probably corrupt
May 25 05:29:48 endless kernel: SQUASHFS error: Failed to read block 0x114becf1e: -5
May 25 05:29:48 endless kernel: I/O error, dev loop1, sector 10401794 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
May 25 05:29:48 endless kernel: Buffer I/O error on dev loop1, logical block 5200897, async page read
May 25 05:29:48 endless kernel: SQUASHFS error: zlib decompression failed, data probably corrupt
May 25 05:29:48 endless kernel: SQUASHFS error: Failed to read block 0x114becf1e: -5
May 25 05:29:48 endless kernel: I/O error, dev loop1, sector 10401796 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
May 25 05:29:48 endless kernel: Buffer I/O error on dev loop1, logical block 5200898, async page read
May 25 05:29:48 endless gnome-image-ins[2932]: gis_scribe_subtask_cb: tee failed: error reading image: Error reading from file: Input/output error
May 25 05:29:48 endless kernel: SQUASHFS error: zlib decompression failed, data probably corrupt
May 25 05:29:48 endless kernel: SQUASHFS error: Failed to read block 0x114becf1e: -5
May 25 05:29:48 endless kernel: I/O error, dev loop1, sector 10401798 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 2
May 25 05:29:48 endless kernel: Buffer I/O error on dev loop1, logical block 5200899, async page read
Either your USB drive or (less likely) the ISO download is defective. You could try a different USB drive, or verifying the SHA256sum of the ISO.