Unable to connect – 8888 Problem

Can anyone shed any light on this problem…

I have a website which has been working fine, but now when I try to view it I get the following message…

“Unable to connect
Firefox can’t establish a connection to the server at sitename.com:8888.”
And the address bar changes to https://sitename.com:8888/

If I then try to access the Dashboard via sitename.com/wp-login.php whilst I am now prompted to enter my Username and Password, I still get the same error, with the address bar this time changing to https://sitename.com:8888/wp-login.php

My hosting company advised that this is likely to be caused by wordpress script running, which is using port 8888 and preventing the site from running.

I was advised on a support forum that it is a problem with plugins, and was advised to go into File Manager and rename my Plugins folder to plugins.hold, which should then allow me to login successfully to my dashboard.

I did this but it didn’t work, and I still have the same problem.

For info, maybe a red herring but I can see a folder called Updates on File Manager which contains no files. I thought that this may be causing the problem so I renamed the folder to Updates2, but still no joy – I still have the same problem.

Please note to my knowledge this site has never been on a local host (I’ve taken over support)

Any help would be greatly appreciated.