I got an error that the CURL extension was missing whilst installing WebMail Lite 8 on WAMP (so on Windows).
After reading that libeay32.dll
was required which was only present in some of the PHP installation folders (such as 7.1.26), I switched the PHP version in use from 7.2.14 to 7.1.26 in the WAMP PHP version menu, and the error went away.