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When i try to update my cs50 ide using update50, i get the following error:

~/workspace/ $ update50
Adding external repos...
Hit http://ppa.launchpad.net trusty InRelease
Ign http://archive.ubuntu.com trusty InRelease                                 
Hit http://archive.ubuntu.com trusty-updates InRelease                         
Hit http://archive.ubuntu.com trusty-security InRelease                        
Hit http://ppa.launchpad.net trusty InRelease                                  
Hit http://ppa.launchpad.net trusty InRelease                                  
Ign http://downloads-distro.mongodb.org dist InRelease                         
Hit http://archive.ubuntu.com trusty Release.gpg                               
Hit http://archive.ubuntu.com trusty Release                                   
Hit http://downloads-distro.mongodb.org dist Release.gpg                       
Ign http://toolbelt.heroku.com ./ InRelease                                    
Hit http://ppa.launchpad.net trusty/main amd64 Packages                        
Hit http://downloads-distro.mongodb.org dist Release                           
Hit http://archive.ubuntu.com trusty-updates/main Sources                      
Hit http://archive.ubuntu.com trusty-updates/restricted Sources                
Hit http://toolbelt.heroku.com ./ Release.gpg                                  
Hit http://ppa.launchpad.net trusty/main i386 Packages                         
Hit http://mirror.cs50.net  InRelease                                          
Hit http://apt.postgresql.org trusty-pgdg InRelease                            
Hit http://toolbelt.heroku.com ./ Release                                      
Get:1 http://mirror.cs50.net  Packages [2909 B]                                
Hit http://ppa.launchpad.net trusty/main amd64 Packages                        
Hit http://apt.postgresql.org trusty-pgdg/main amd64 Packages                  
Hit http://archive.ubuntu.com trusty-updates/universe Sources                  
Hit http://downloads-distro.mongodb.org dist/10gen amd64 Packages              
Hit http://toolbelt.heroku.com ./ Packages                                     
Hit http://archive.ubuntu.com trusty-updates/main amd64 Packages               
Hit http://ppa.launchpad.net trusty/main i386 Packages                         
Hit http://apt.postgresql.org trusty-pgdg/main i386 Packages                   
Hit http://archive.ubuntu.com trusty-updates/restricted amd64 Packages         
Hit http://archive.ubuntu.com trusty-updates/universe amd64 Packages           
Hit http://ppa.launchpad.net trusty/main amd64 Packages                        
Hit http://downloads-distro.mongodb.org dist/10gen i386 Packages               
Hit http://archive.ubuntu.com trusty-updates/main i386 Packages                
Hit http://archive.ubuntu.com trusty-updates/restricted i386 Packages          
Hit http://ppa.launchpad.net trusty/main i386 Packages                         
Hit http://archive.ubuntu.com trusty-updates/universe i386 Packages            
Hit http://archive.ubuntu.com trusty-security/main Sources                     
Hit http://archive.ubuntu.com trusty-security/restricted Sources               
Hit http://archive.ubuntu.com trusty-security/universe Sources                 
Hit http://archive.ubuntu.com trusty-security/main amd64 Packages              
Hit http://archive.ubuntu.com trusty-security/restricted amd64 Packages        
Hit http://archive.ubuntu.com trusty-security/universe amd64 Packages          
Hit http://archive.ubuntu.com trusty-security/main i386 Packages               
Hit http://archive.ubuntu.com trusty-security/restricted i386 Packages         
Hit http://archive.ubuntu.com trusty-security/universe i386 Packages           
Hit http://archive.ubuntu.com trusty/main Sources                              
Hit http://archive.ubuntu.com trusty/restricted Sources                        
Hit http://archive.ubuntu.com trusty/universe Sources                          
Hit http://archive.ubuntu.com trusty/main amd64 Packages                       
Hit http://archive.ubuntu.com trusty/restricted amd64 Packages                 
Hit http://archive.ubuntu.com trusty/universe amd64 Packages                   
Hit http://archive.ubuntu.com trusty/main i386 Packages                        
Hit http://archive.ubuntu.com trusty/restricted i386 Packages                  
Hit https://packagecloud.io trusty InRelease                                   
Hit http://archive.ubuntu.com trusty/universe i386 Packages                    
Get:2 https://packagecloud.io trusty/main Sources                              
Get:3 https://packagecloud.io trusty/main amd64 Packages                       
Get:4 https://packagecloud.io trusty/main i386 Packages                        
Fetched 3962 B in 17s (227 B/s)                                                
W: Failed to fetch 
https://packagecloud.io/cs50/repo/ubuntu/dists/trusty/main/source/Sources  
Hash Sum mismatch

W: Failed to fetch 
https://packagecloud.io/cs50/repo/ubuntu/dists/trusty/main/binary- 
amd64/Packages  Hash Sum mismatch

W: Failed to fetch 
https://packagecloud.io/cs50/repo/ubuntu/dists/trusty/main/binary- 
i386/Packages  Hash Sum mismatch

E: Some index files failed to download. They have been ignored, or old ones 
used instead.
OK
deb https://packagecloud.io/github/git-lfs/ubuntu/ trusty main
deb-src https://packagecloud.io/github/git-lfs/ubuntu/ trusty main
Hit https://packagecloud.io trusty InRelease
Get:1 https://packagecloud.io trusty/main Sources
Get:2 https://packagecloud.io trusty/main amd64 Packages                       
Get:3 https://packagecloud.io trusty/main i386 Packages                        
Fetched 1056 B in 13s (79 B/s)                                                 
W: Failed to fetch https://packagecloud.io/github/git- 
lfs/ubuntu/dists/trusty/main/source/Sources  Hash Sum mismatch

W: Failed to fetch https://packagecloud.io/github/git- 
lfs/ubuntu/dists/trusty/main/binary-amd64/Packages  Hash Sum mismatch

W: Failed to fetch https://packagecloud.io/github/git- 
lfs/ubuntu/dists/trusty/main/binary-i386/Packages  Hash Sum mismatch

E: Some index files failed to download. They have been ignored, or old ones 
used instead.
Unable to update workspace. Try again in a few minutes!

This has happened many times. I have tried on different connections, but there is no change. NOTE: I am using offline version of cs50ide using docker toolbox.

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