I got a error when i try to register a email adress that is already in my database. If a visitor forgot that he is already a member of my newsletter and he try to subscrib again he got this errorpage:
Warning: file_put_contents(/var/kunden/webs/###.de/neueseite/wp-content/logs/newsletter/subscription-5b97cfcd.txt) [function.file-put-contents]: failed to open stream: Permission denied in /var/kunden/webs/###.de/neueseite/wp-content/plugins/newsletter/includes/logger.php on line 51
Warning: Cannot modify header information – headers already sent by (output started at /var/kunden/webs/###.de/neueseite/wp-content/plugins/newsletter/includes/logger.php:51) in /var/kunden/webs/###.de/neueseite/wp-content/plugins/newsletter/subscription/subscription.php on line 464
Uhm, that is a log file. Have you the logs enabled on diagnostic panel? Of so, try to disable it.
It’s strange since those warnings should anyway be suppressed. Let me know if the logs are disabled on your Newsletter, since it means I try to write (in come situations) to the log files ignoring the setting and I must change the code.