Problem with the "package_stm_index.json"

Hello everybody!
I am trying to download the "stm32duino" libruary. At the following way 'File->Preferences->Settings->Additional Boards Manager URLs' I linked
BoardManagerFiles/package_stm_index.json at main · stm32duino/BoardManagerFiles · GitHub. By the next step I opened 'Tools->Board: ->Board manager'. After all I got the next massage from IDE: "Skipping contributed index file C:\Users\Work\AppData\Local\Arduino15\package_stm_index.json, parsing error occured:
com.fasterxml.jackson.core.JsonParseException: Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
at [Source: (FileInputStream); line: 7, column: 2]"

Thanks for watching!
P.S. I tried to reinstall "package_stm_index.json" in Arduino15. Renamed it like "package_stm_index.json.bak".

Can you access the file using a browser?

If yes, check firewall settings (e.g. a corporate environment might block access based on applications).

PS
Screenshot are useless, copy the error message and paste here.

Thank you! It was my mistake. The link wasn't correct. The right link is https://raw.githubusercontent.com/stm32duino/BoardManagerFiles/main/STM32/package_stm_index.json

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