Deprecated function: Drupal\bootstrap\Utility\DrupalAttributes implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in include() (line 16 of drupal9.3/html/themes/contrib/bootstrap/src/Utility/DrupalAttributes.php
I moved to a nginx, Drupal9.3, php7.4.30
Closed: won't fix
3.23
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
It's here: https://git.drupalcode.org/project/bootstrap/-/blob/8.x-3.x/src/Utility/... --- `\Serializable,`