There is a bug in /usr/local/lsws/admin/html.open/lib/util/build_php/buildfunc.inc.php
The issue occurs when trying to build php from “https://example.com:7080/index.php#view/compilePHP.php”
The line in question is 692
$ver = 'memcache-' . BuildConfig::GetVersion(BuildConfig::MEMCACHE_VERSION8);
This should be corrected to: As referenced from /usr/local/lsws/admin/html.open/lib/util/build_php/BuildConfig.php
$ver = 'memcache-' . BuildConfig::GetVersion(BuildConfig::MEMCACHE8_VERSION);