When importing the content as just as in the screenshot provided I get this:
Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator at root@localhost to inform them of the time this error occurred, and the actions you performed just before this error.
More information about this error may be available in the server error log.
Apache/2.4.23 (Unix) Server at http://www.covertvr.co.uk Port 80
Is this a problem with our Webhost?
many thanks in advance