Still a problem - see Problem downloading package_Maixduino_k210_index.json #83

[NickCarter2]

Using Arduino IDE in Windows 10 . I can load the board from the URL I checked by changing versions.
#https://dl.sipeed.com/MAIX/Maixduino/package_Maixduino_k210_index.json?id=arduino

Using Ubuntu 20.04.1 I have the latest Arduino 1.8.3 IDE loaded, I try with any of these links in the preferences
https://dl.sipeed.com/MAIX/Maixduino/package_Maixduino_k210_index.json?id=arduino
https://raw.githubusercontent.com/JonRobo/Maixduino_Code/master/package_Maixduino_k210_index.json
http://dl.sipeed.com/MAIX/Maixduino/package_Maixduino_k210_dl_cdn_index.json

and I get the MAIXduino board listed in Board manager but when I try to install I get this error.
I know the issue was closed, but I am still having the problem.

no protocol: #https://dl.sipeed.com/MAIX/Maixduino/package_Maixduino_k210_index.json?id=arduino
no protocol: #https://dl.sipeed.com/MAIX/Maixduino/package_Maixduino_k210_index.json?id=arduino
CRC doesn't match, file is corrupted. It may be a temporary problem, please retry later.
java.lang.RuntimeException: java.lang.Exception: CRC doesn't match, file is corrupted. It may be a temporary problem, please retry later.
at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onInstallPressed$2(ContributionManagerUI.java:175)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.Exception: CRC doesn't match, file is corrupted. It may be a temporary problem, please retry later.
at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:105)
at cc.arduino.contributions.DownloadableContributionsDownloader.download(DownloadableContributionsDownloader.java:60)
at cc.arduino.contributions.packages.ContributionInstaller.install(ContributionInstaller.java:113)
at cc.arduino.contributions.packages.ui.ContributionManagerUI.lambda$onInstallPressed$2(ContributionManagerUI.java:172)
... 1 more