Unable to upload certain media files
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I am having an intermittent issue uploading media files from the WP Admin Media uploader. Not all files fail, but the ones that do are quite small, 38k jpg, for example. I isolated the issue to be the WP Cerber plugin as disabling it will allow the same file to upload without issue.
I checked the WP Cerber activity log and find the following for the failed attempts:
December 24, 2018, 6:05 pm https://mydomain.com/wp-admin/async-upload.php
GET HTTP 404 Not Found 2954 msI checked the specified file, async-upload.php is indeed present and as mentioned works fine with WP Cerber plugin disabled.
I checked a similar thread that was posted earlier which mentioned the mbstring php module and I checked it is enabled on my server. I am on a CPanel Linux server. Any help would be appreciated as WP Cerber is working great otherwise.
WP Cerber version 7.9.3
WordPress 4.9.9
PHP 7.1Thank you.
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