@vgt
Your log shows the wallet is failing because a system library, libsoftokn3.so from the NSS package, is missing or broken.
This is a system issue, not a wallet issue, and nothing below touches your wallet files or keys.
Try these in order.
Step 1, check if the library exists
ldconfig -p | grep libsoftokn3
If nothing comes back, it's missing, continue.
Step 2, reinstall the NSS packages
sudo apt-get update
sudo apt-get install --reinstall libnss3 libnss3-tools
Step 3, check again
ldconfig -p | grep libsoftokn3
You should now see it listed.
Step 4, try launching the wallet. If it opens, you're done.
Step 5, if it still fails with the same NSS error, rename your user certificate database so it regenerates fresh, this is a rename, not a delete, fully reversible
mv ~/.pki/nssdb ~/.pki/nssdb.bak
(If you've ever manually imported personal certificates into your browser's system store, they're preserved in the .bak, everything else regenerates automatically.)
Step 6, launch the wallet again.
If these steps dont help you can create a ticket at https://zano.org/support