just a hint, it looks like the setup of your Discourse instance is not yet fully completed.
In the TOS “discuss dot europeanspring dot net/tos” for example there are still the generic variables (like company_domain and company_short_name) which would be filled automatically with the correct content once you configure those fields in the admin setup.
I am the Admin of another Discourse instance therefore I did now notice these minor errors.
(I am a new member to this forum therefore I am not yet allowed to post links. So I had to replace the link url with dots.)