Problem with PHP 7.4 and the solution

[gabrielssevero]

There is a problem of compatibility with php 7.4, it is in the file: plugins\dmitrybykov\htmlminify\vendor\matthiasmullie\minify\src\CSS.php

The problem is in the line 528 in the implode, in php 7.4 you need to change the position of the glue element and the array, so change: '/(?<=[: ])('.implode(array_keys($colors), '|').')(?=[; }])/i',
for: '/(?<=[: ])('.implode('|', array_keys($colors)).')(?=[; }])/i',