I ran the update command in the Terminal:
Sudo apt update
Updating ends with the following error:
The following signatures were invalid: 7B0FAB3A13B907435925D9C954422A4B98AB5139
Hit:13 https:
Hit:14 https:
Ign:15 http:
Hit:18 http:
Hit:19 http:
Hit:20 http:
Hit:21 http:
Hit:22 http:
Hit:23 http:
Hit:24 http:
Err:25 http:
404 Not Found [IP: 91.189.95.85 80]
Get:26 http:
Err:26 http:
The following signatures were invalid: 883E8688397576B6C509DF495A9A06AEF9CB8DB0
Reading package lists... Done
W: GPG error: http:
E: The repository 'http:
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: Skipping acquire of configured file 'Sources' as repository 'https:
E: The repository 'http:
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
W: GPG error: http:
E: The repository 'http:
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
I have tried going to software and updates then tried to change the source repositories, but nothing sims to work. And help would be gladly appreciated