Fatal error: Uncaught Exception: wfWAFAttackDataStorageFileEngine::unpackMicrotime $binary expected to be string with length of 8, received string of length 0
in /var/www/html/wp-content/plugins/wordfence/vendor/wordfence/wf-waf/src/lib/storage/file.php on line 963

Call stack:

1. wfWAFAttackDataStorageFileEngine::unpackMicrotime()
   wp-content/plugins/wordfence/vendor/wordfence/wf-waf/src/lib/storage/file.php:1171
2. wfWAFAttackDataStorageFileEngine::unpackHeader()
   wp-content/plugins/wordfence/vendor/wordfence/wf-waf/src/lib/storage/file.php:1269
3. wfWAFAttackDataStorageFileEngine::getRowCount()
   wp-content/plugins/wordfence/vendor/wordfence/wf-waf/src/lib/storage/file.php:1374
4. wfWAFAttackDataStorageFileEngine::getNewestTimestamp()
   wp-content/plugins/wordfence/vendor/wordfence/wf-waf/src/lib/storage/file.php:176
5. wfWAFStorageFile::hasNewerAttackData()
   wp-content/plugins/wordfence/lib/wordfenceClass.php:2367
6. wordfence::veryFirstAction()
   wp-includes/class-wp-hook.php:303
7. WP_Hook::apply_filters()
   wp-includes/class-wp-hook.php:327
8. WP_Hook::do_action()
   wp-includes/plugin.php:470
9. do_action()
   wp-settings.php:441
10. require_once()
    wp-config.php:95
11. require_once()
    wp-load.php:50
12. require_once()
    wp-blog-header.php:13
13. require()
    index.php:17