Fatal error on widget activation after uploading to remote server

Hi

Having uploaded site from my local server when I reinstall easy customixable text widget I get the following message when I try to activate:

Fatal error: Cannot use object of type WP_Error as array in /home/cluster-sites/1/s/song-people.co.uk/public_html/wp-content/plugins/easy-customizable-text-widget/easy-customizable-text-widget.php on line 151

toofast24 reported an almost identical problem which was resolved but I can’t see the answer

any help would be hugely appreciated bearing in mind I am not hugely proficient in coding – tend to follow instructions

thanks