As requested, here the output of "uname -m":
x86_64
And the output of "dpkg --print-architecture":
i386
Following the exchanges on another post, further info can be provided.
Output of "strings /usr/bin/pihole-FTL | head":
/lib64/ld-linux-x86-64.so.2
Output of "dpkg -S ld-linux-x86-64.so.2":
dpkg-query: no path found matching pattern *ld-linux-x86-64.so.2*
Output of "stat ld-linux-x86-64.so.2":
stat: cannot stat 'ld-linux-x86-64.so.2': No such file or directory
Output of "whereis ld-linux-x86-64.so.2":
ld-linux-x86-64.so.2:
Thus, from above steps, to me it looks like a library is missing...
However, when firing the command "sudo apt-get install libc6" as suggested with another post, I'm getting the following output:
Reading package lists... Done
Building dependency tree
Reading state information... Done
libc6 is already the newest version (2.24-11+deb9u1).
0 upgraded, 0 newly installed, 0 to remove and 2 not upgraded.