Can't create file during installation on Ubuntu 18.04 TLS

[H__Tekin]

We've set up a fresh installed Ubuntu 18.04 Server TLS, downloaded all updates and also downloaded the installer file "atlassian-confluence-7.4.0-x64.bin". We made sure that the hostname does resolve to an IP address by editing the /etc/hosts file.

The installer file has been made executable using command "chmod a+x atlassian-confluence-7.4.0-x64.bin"

We ran the installer using command "sudo ./atlassian-confluence-X.X.X-x64.bin" and chose to perform a custom installation (option 2).

When choosing to install Confluence as a service we receive the following error message:

/opt/atlassian/confluence/confluence/WEB-INF/atlassian-bundled-plugins/confluence-cql-plugin-4.1.10.jar
Could not create this file. Shall I try again?
Yes [y], Cancel [c]

Appreciate your assistance. Thanks!