I'm still learning about linux, so I don't know how to fix it, but I'll explain what happened I just did dual boot, put / on ssd and /home on hdd ... I used ISO 5.1.4 Hera When I first opened the store: enter image description here

  • you mean by "first opened the store" that you opened the app center and all of sudden the terminal opened? (that black window you pasted a screenshot of it) – Omar Shawky May 3 '20 at 22:36
  • I just put an image after running sudo apt-get update to be able to show it more completely, the app center warning was more simplified, but the error is the same. – Vinícus May 4 '20 at 18:33

Try this in a terminal:

sudo rm -r /var/lib/apt/lists/*

and then:

sudo apt-get clean && sudo apt-get update

Update will take some time because it's re-downloading all the files.

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