Install libssl1.0-dev by entering the following commands in the terminal:
sudo apt update sudo apt install libssl1.0-dev
Description:
Secure Sockets Layer toolkit - development files
This package is part of the OpenSSL project's implementation of the SSL and TLS cryptographic protocols for secure communication over the Internet. . It contains development libraries, header files, and manpages for libssl and libcrypto.
Homepage: https://www.openssl.org
Version: 1.0.2n-1ubuntu5
Section: libdevel