Fail at google chrome installation

[Vinícius Alves Hax]

After an installation from scratch of Ubuntu 18.04 I tried to install the Google Chrome browser. I downloaded the package from the site normally. After a Double-click on the package a message with the error message "GetTempFile (30: Read-only file system)" appears (see attached image).

I tried to install it on the terminal with the command "dpkg -i" and a similar message appeared.

Today, after restarting the computer, I double-clicked again and the installation happened normally.

I do not know if there is any connection but before installing Chrome I used the same method (download and double-click) to install the Dropbox client and the installation occurred normally.

Dropbox package version: 2018.11.28
Chrome package version: 71.0.3578.98-1

I am using Ubuntu in pt-br language.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: dpkg 1.19.0.5ubuntu2.1
ProcVersionSignature: Ubuntu 4.15.0-42.45-generic 4.15.18
Uname: Linux 4.15.0-42-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.5
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Thu Dec 20 17:35:37 2018
InstallationDate: Installed on 2018-12-19 (0 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
SourcePackage: dpkg
UpgradeStatus: No upgrade log present (probably fresh install)