I meant the Monolog library.
The Monolog library is available in 3 main versions:
Version 1.x: requires PHP 5.3+
Version 2.x: requires PHP 7.2+
Version 3.x: requires PHP 8.1+
Shield plugin started using Version 2 and your theme is using Version 1, I think, and this couse error.
Here is post from Shield about it:
Shield Security Moving To Minimum PHP 7.2
-
This reply was modified 1 year, 1 month ago by Arek.