When i type this:

sudo apt-get install chromium-browser

I get this:

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following NEW packages will be installed:
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 48.3 kB of archives.
After this operation, 164 kB of additional disk space will be used.
Get:1 http://dz.archive.ubuntu.com/ubuntu focal/universe amd64 chromium-browser amd64 80.0.3987.163-0ubuntu1 [48.3 kB]
Fetched 48.3 kB in 6s (8,267 B/s)           
Preconfiguring packages ...
Selecting previously unselected package chromium-browser.
(Reading database ... 178512 files and directories currently installed.)
Preparing to unpack .../chromium-browser_80.0.3987.163-0ubuntu1_amd64.deb ...
=> Installing the chromium snap
==> Checking connectivity with the snap store
==> Installing the chromium snap
error: snap "chromium" has "install-snap" change in progress
dpkg: error processing archive /var/cache/apt/archives/chromium-browser_80.0.3987.163-0ubuntu1_amd64.deb (--unpack):
 new chromium-browser package pre-installation script subprocess returned error exit status 10
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)

What seems to be the problem?


i'm thinking that you have something in background that is preventing that you install the package

run $ snap changes

you will get something similar to this, you should search on any doing/ongoing process so you can abort it

ID Estate Generated Ready Description
10 Doing  when            installing snap "chromium"

Now you will grab that Doing process ID and you just type this, 10 is my process you will get a different one. With this command, you will abort the process so you can generate a new one hopefully without any trouble

$ sudo snap abort 10

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