Pihole not able to access internet

[nickhw22]

Trying to update, but cannot access internet.

Here is what I see:

pihole -up
[i] Checking for updates...
fatal: unable to access 'https://github.com/pi-hole/pi-hole.git/': Could not resolve host: github.com
[i] Pi-hole Core: up to date
[i] FTL: update available

[i] FTL out of date

[i] FTL Checks...
[✓] Detected ARM-hf architecture (armv6 or lower) Using ARM binary
[i] Checking for existing FTL binary...
[✗] Downloading and Installing FTL
Error: Unable to get latest release location from GitHub

Debug token:
Can't upload the log via pihole -d. See it here

I cannot ping any websites from the pi-hole.
My internet is working fine on all other devices.
I have reset the router, this has not helped.
I added a new wireless printer to my network yesterday - not sure if this is relevant, but that is the only change I made before noticing the problem with the pihole.

Any help much appreciated!

[Mcat12]

You have FTL 3.0 installed even though it requires Pi-hole 3.3 (you have 3.2.1). Dnsmasq is failing because it is too old to understand one of the config options (which was introduced with 3.3). Run pihole -r to repair and then read the updates on the blog post to update:
https://pi-hole.net/2018/02/14/pi-hole-v3-3-released-its-extra-special/

[nickhw22]

Thanks for replying quickly Mcat12.

After downgrading to previous version as here, internet access returned, thanks!

I then ran a long overdue sudo apt-get update and upgrade, then switched back to master branch (comment 3 here). Then installed the updated dnsmasq version as per option 2 here, ran pihole -up again and it's all working fine now.

Many thanks