Help to solve for this problem

The following error Occured everytime.............
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root@kali:~# apt-get update
Err http://http.kali.org kali Release.gpg
Could not connect to on24.com:8080 (199.83.44.153). - connect (111: Connection refused)
Err http://http.kali.org kali-dev Release.gpg
Unable to connect to on24.com:8080:
Err http://security.kali.org kali/updates Release.gpg
Could not connect to on24.com:8080 (199.83.44.153). - connect (111: Connection refused)
Reading package lists... Done
W: Failed to fetch http://security.kali.org/kali-securi...es/Release.gpg Could not connect to on24.com:8080 (199.83.44.153). - connect (111: Connection refused)

W: Failed to fetch http://http.kali.org/kali/dists/kali/Release.gpg Could not connect to on24.com:8080 (199.83.44.153). - connect (111: Connection refused)

W: Failed to fetch http://http.kali.org/kali/dists/kali-dev/Release.gpg Unable to connect to on24.com:8080:

W: Some index files failed to download. They have been ignored, or old ones used instead.