Fatal Error

This plugin is exactly what I am looking for. I have installed and started to test it but each time I try to add a widget I get an error like the following:

Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 105 bytes) in /var/sites/e/eastleighborough.co.uk/public_html/wp-includes/plugin.php on line 108

Could you advise please?

https://www.ads-software.com/plugins/responsive-column-widgets/