I have a problem like you

you need open terminal and do this command :

• sudo apt update
• sudo apt install packagekit
• sudo dpkg --configure -a
• when you run "sudo dpkg --configure -a" the system need your new enroll key machine type and retype

after that viola!! your appcenter running well again!!

I have a problem like you

you need open terminal and do this command :

sudo apt update
sudo apt install packagekit
sudo dpkg --configure -a

When you run "sudo dpkg --configure -a" the system need your new enroll key machine type and retype

after that viola!! your appcenter running well again!!