This makes us understand that the host is reachable. You can also get wget https://repo.turris.cz/hbs/omnia/lists/pkglists/datacollect.lua, again from router. It will download the script, which once downloaded, you can safely delete. So we are sure that the resource is available to Turris OS and therefore the problem moves elsewhere. Could you also tell us which packages have you installed from reForis?
Take a look at too:
https://forum.test.turris.cz/t/getting-uri-failed-for-luci-controls/13575