Call-time pass-by-reference error

Hi,

I hope someone can help…

I tried logging into the admin area of my WordPress site and I get the following error:-

Fatal error: Call-time pass-by-reference has been removed in /homepages/34/d280982719/htdocs/www.canvasart-online.co.uk/wp-content/plugins/types/admin.php on line 147

I did try removing the ampersand from the line in question but once logged in I could see a lot of the admin functionality (i.e. add new posts, pages, etc)

Does anyone know how I can fix this?

Many thanks

https://www.ads-software.com/plugins/types/