I got his maps running again.? There are two issues that need to be changed on the Maps in Preferences.? On the base map setting, the URL as it appears on a new install is incorrect, at least in the US.? Change the ".de" at the end of the URL to ".org" and the base map will work again.
On the three URLs for the thunderforest maps you need to remove the "s" from the https: at the beginning of the URL.? That site is not using a secured server, so the added s causes the URL to fail.? HTTP:// is all that is needed there.? Once you correct these problems, and have the api key for the thunderforest maps, all will start working properly.
Glen - KG5CEN
Glen Strecker