Problem fixed after upgraded to Askimet v4.0.6.
Bug solved. Thank you for the quick response.
This seems to be a duplication of the error previously[1] reported. Solution is being developed.
[1] https://ww.wp.xz.cn/support/topic/help-fatal-error-after-update/
Same error[1] here with v4.0.4a7[2] on WordPress v4.9.6 on PHP Version 5.4.45. phpinfo() available on request.
[1] Fatal error: Can’t use function return value in write context in /home/username/public_html/wp-content/plugins/akismet/class.akismet-admin.php on line 1060
[2] Akismet Anti-Spam Version 4.0.4a7
