Thanks for replying Ramesh.
We hadn’t performed any updates on plugins or the theme when the error started to occur. In fact I had successfully uploaded 5 paintings in the hour before all went pear shaped.
In our attempts to fix the issue my colleague performed 9 updates of various plugins, which had no effect. We’re being notified of available theme updates which we haven’t done as yet.
If I deactivate the plugins will their specific settings be lost?
Thanks again,
Lizzy