Has the issue with dnsmasq v<2.78 been resolved?

[Mcat12]

See this post for some workarounds for v3.3:

Why can't I run Pi-hole v3.3+ on Raspbian Jessie or with dnsmasq < v2.72?

Update: 2018-08-06 As of v4.0, Pi-hole ships with _FTL_DNS, our fork of dnsmasq, which should restore compatibility with Raspbian Jessie. We still recommend installing a newer OS as Jessie is EOL anyway. By default, Raspbian Jessie only supports dnsmasq v2.72, which does not work with the log-queries=extra flag, which is required for Pi-hole v3.3+. You may see error messages such as: dnsmasq: extraneous parameter at line 37 of /etc/dnsmasq.d/01-pihole.conf failed! There are two option…

You could also update to the FTLDNS beta.