More PHP warnings in the log file

Dear wpDiscuz support team,
there is another set of PHP Warnings observed in the error log file:

[01-Apr-2022 00:30:04 UTC] PHP Fatal error:  Uncaught Error: Cannot use string offset as an array in /dom21465/wp-content/plugins/wpdiscuz/themes/default/class.WpdiscuzWalker.php:45
Stack trace:
#0 /wordpress-versions/5.9.2/wp-includes/class-wp-walker.php(146): WpdiscuzWalker->start_el('', Object(WP_Comment), 1, Array)
#1 /wordpress-versions/5.9.2/wp-includes/class-walker-comment.php(139): Walker->display_element(Object(WP_Comment), Array, '5', 0, Array, '')
#2 /wordpress-versions/5.9.2/wp-includes/class-wp-walker.php(389): Walker_Comment->display_element(Object(WP_Comment), Array, '5', 0, Array, '')
#3 /wordpress-versions/5.9.2/wp-includes/comment-template.php(2250): Walker->paged_walk(Array, '5', 0, 0, Array)
#4 /dom21465/wp-content/plugins/wpdiscuz/class.WpdiscuzCore.php(784): wp_list_comments(Array, Array)
#5 /dom21465/wp-content/plugins/wpdiscuz/themes/default/comment-form.php(437): WpdiscuzCore->getWPComments(Array)
#6 /wordpress-versions/5.9.2/wp-includes/comment-template.php(1554): require('/dom21465/wp-co...')
#7 /dom21465/wp-content/themes/swi in /dom21465/wp-content/plugins/wpdiscuz/themes/default/class.WpdiscuzWalker.php on line 45
[06-Apr-2022 21:41:05 UTC] PHP Warning:  dir(/dom21465/wp-content/uploads/wpdiscuz/cache/comments/621653/extra/): failed to open dir: No such file or directory in /wordpress-versions/5.9.2/wp-admin/includes/class-wp-filesystem-direct.php on line 613
[06-Apr-2022 21:41:07 UTC] PHP Warning:  dir(/dom21465/wp-content/uploads/wpdiscuz/cache/comments/651359/extra/): failed to open dir: No such file or directory in /wordpress-versions/5.9.2/wp-admin/includes/class-wp-filesystem-direct.php on line 613
[06-Apr-2022 21:41:17 UTC] PHP Warning:  dir(/dom21465/wp-content/uploads/wpdiscuz/cache/comments/143137/): failed to open dir: No such file or directory in /wordpress-versions/5.9.2/wp-admin/includes/class-wp-filesystem-direct.php on line 613
[06-Apr-2022 21:41:18 UTC] PHP Warning:  dir(/dom21465/wp-content/uploads/wpdiscuz/cache/comments/633019/extra/): failed to open dir: No such file or directory in /wordpress-versions/5.9.2/wp-admin/includes/class-wp-filesystem-direct.php on line 613
[06-Apr-2022 21:41:19 UTC] PHP Warning:  dir(/dom21465/wp-content/uploads/wpdiscuz/cache/comments/382070/extra/): failed to open dir: No such file or directory in /wordpress-versions/5.9.2/wp-admin/includes/class-wp-filesystem-direct.php on line 613
[06-Apr-2022 21:41:19 UTC] PHP Warning:  dir(/dom21465/wp-content/uploads/wpdiscuz/cache/comments/6601/extra/): failed to open dir: No such file or directory in /wordpress-versions/5.9.2/wp-admin/includes/class-wp-filesystem-direct.php on line 613
[06-Apr-2022 21:41:20 UTC] PHP Warning:  dir(/dom21465/wp-content/uploads/wpdiscuz/cache/comments/626479/): failed to open dir: No such file or directory in /wordpress-versions/5.9.2/wp-admin/includes/class-wp-filesystem-direct.php on line 613
[06-Apr-2022 21:41:20 UTC] PHP Warning:  dir(/dom21465/wp-content/uploads/wpdiscuz/cache/comments/347335/): failed to open dir: No such file or directory in /wordpress-versions/5.9.2/wp-admin/includes/class-wp-filesystem-direct.php on line 613

We will be happy if you fix them in the next plugin version, thank you!