Long error message shown at activation

Hi, I have just installed the Events Calendar Category Colors, which I had previously used on another website. However, as soon as I activate it, the following message is displayed on top of my dashboard, as well as on top of my website:

***
nstant GLOB_BRACE – assumed ‘GLOB_BRACE’ (this will throw an Error in a future version of PHP) in /web/htdocs/www.cucinalcubo.it/home/wp-content/plugins/the-events-calendar-category-colors/src/Category_Colors/Frontend.php on line 117

Warning: glob() expects parameter 2 to be integer, string given in /web/htdocs/www.cucinalcubo.it/home/wp-content/plugins/the-events-calendar-category-colors/src/Category_Colors/Frontend.php on line 117

Warning: Use of undefined constant GLOB_BRACE – assumed ‘GLOB_BRACE’ (this will throw an Error in a future version of PHP) in /web/htdocs/www.cucinalcubo.it/home/wp-content/plugins/the-events-calendar-category-colors/src/Category_Colors/Frontend.php on line 141

Warning: glob() expects parameter 2 to be integer, string given in /web/htdocs/www.cucinalcubo.it/home/wp-content/plugins/the-events-calendar-category-colors/src/Category_Colors/Frontend.php on line 141

Warning: Invalid argument supplied for foreach() in /web/htdocs/www.cucinalcubo.it/home/wp-content/plugins/the-events-calendar-category-colors/src/Category_Colors/Frontend.php on line 141
***

Anyone knows what is this about?

Thanks!

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