Incorrect country name (Czech) in mirrors.json
The share/mirrors.json file contains an incorrect country name on line 175:
"country": "Czech",
"Czech" is not a country, the equivalent of other country values in the file like "France", "Germany" or "China". It is the equivalent of "French", "German" or "Chinese" – an adjective meaning "belonging to or relating to the Czech Republic", and a noun meaning the "Czech language" or a "Czech person":
https://dictionary.cambridge.org/dictionary/english/czech
The only two correct and official names for this country are "the Czech Republic" (the official full name) and "Czechia" (the official short name registered in the United Nations):
https://dictionary.cambridge.org/dictionary/english/czechia https://unterm.un.org/UNTERM/Display/Record/UNHQ/NA/4275087d-4018-4082-899d-95f37efeda65
So, please change this line to:
"country": "Czechia",