Recently I tried to install the SAMD21 pack automatically using the latest uVision v5.33 and I failed miserably due to pack integrity check error:
Cannot install Pack Microchip.SAMD21_DFP.3.3.98: Pack integrity check failed
So I tried to download the pack manually and every time I do that I get the empty file (you can see the size of 0 when you press the save button so it is not a problem with the AV I guess)
I tried other pack for different MCU vendor and everything is fine.
With the Pack Installer I just successfully installed the Microchip::SAMD21_DFP 3.3.98, see:
Yes, I manage to install this packet a couple of days ago - it looks like they fixed it.
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