By default, removable drives are mounted without the exec option, so that binaries on a USB stick, say, can't run.
I suggest first unmounting Dolphin's automount, then mounting with sudo, to see if the problem still occurs. I don't think an explicit mount -o exec is needed, but after mounting run mount to see if it says (noexec), and if it does, unmount and try -o exec. Then, if that exercise works, add an entry to your /etc/fstab; use sudo blkid to find the right UUIDs.
I suggest first unmounting Dolphin's automount, then mounting with sudo, to see if the problem still occurs. I don't think an explicit mount -o exec is needed, but after mounting run mount to see if it says (noexec), and if it does, unmount and try -o exec. Then, if that exercise works, add an entry to your /etc/fstab; use sudo blkid to find the right UUIDs.
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