the extension loads a 404 page

Hi there, 
It seems you had an issue with the files/folder permission. Please open the SSH terminal, go to your M2 folder and run these commands to update the files/folder permission again: 

find . -type d -exec chmod 755 {} +;
find . -type f -exec chmod 644 {} +;

If your server is Nginx, you have to perform extra settings for Nginx as indicated in the guide of our tool in Readme.html. 
Regards,
Ubertheme team

Hi colm8020,

CException
Application runtime path “/…./m2.showfront.com.au/public_html/pub/ub-tool/protected/runtime” is not valid. Please make sure it is a directory writable by the Web server process.

Please open your SSH terminal, go to the M2 root folder and run the following command to change the permission:

chmod -R 775 pub/ub-tool/protected/runtime;

Once done, check the issue you mentioned again.
 
PS. For any additional questions you might have, please submit a new ticket, we will follow up with you then. 

Regards,
Mall.