Comment 8 for bug 1766046

[SOLVED]

I had similar problem as the bug report with similar outputs for requested commands. I got around by manually copying libzstd.so.1 libzstd.so.1.3.3 to libraries folder and it WORKED :)

Steps involved:

1 . Download original .deb from

 http://mirrors.kernel.org/ubuntu/pool/main/libz/libzstd/libzstd1_1.3.3+dfsg-2ubuntu1_amd64.deb

2. Extract it downloads.

3. cd into the extracted folder libzstd1_1.3.3+dfsg-2ubuntu1_amd64

4. extract "data" folder

5. cd into Downloads

6. Run following commands

sudo cp libzstd1_1.3.3+dfsg-2ubuntu1_amd64/data/usr/lib/x86_64-linux-gnu/libzstd.so.1 /usr/lib/x86_64-linux-gnu/

 sudo cp libzstd1_1.3.3+dfsg-2ubuntu1_amd64/data/usr/lib/x86_64-linux-gnu/libzstd.so.1.3.3 /usr/lib/x86_64-linux-gnu/

And dpkg works fine now