I think my cpanel host recently upgraded some software on their server, and suddenly all my usual proceedures for rolling out web apps broke, with Internal server errors and this in the error log “error: directory is writable by others”. So, the obvious solution of going into the file manager and changing the permissions was tried, but the changes never stuck.
In the end I had to use FTP, and chmod 755 all the directories which were PHP entry points, ie held php files which the users accessed (index.php). Note group and other has no write access. If group has write access then you’ll get the same error message.
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