This error occurs in lite-client if the libreadline-dev library is missing in ubuntu.
Especially if you use lite-client from one version in another (example: ubuntu 18 in ubuntu 20).
Solution:
install libreadline-dev .
sudo apt install libreadline-dev
additional
if you use ubuntu 18 lite-client for ubuntu > 18
the lite-client use libreadline.so.7 but you have an older version so it doesn't find it.
example with libreadline.so.8 installed in your ubuntu fix it with:
This error occurs in lite-client if the libreadline-dev library is missing in ubuntu. Especially if you use lite-client from one version in another (example: ubuntu 18 in ubuntu 20).
Solution:
install libreadline-dev .
additional
if you use ubuntu 18 lite-client for ubuntu > 18 the lite-client use libreadline.so.7 but you have an older version so it doesn't find it. example with libreadline.so.8 installed in your ubuntu fix it with: