Hello guys and thank you in advance for the help.
I get this error message when subscribing a new email from the " Subscribe to our Newsletters" Link on the domain.com/list page.
I did search the forum for this issue, i found a possible solution adding the following line to the config.php file:
I added it at the end of the config file. Saved… then purged the cache on the server just in case, but i still get the same error.
Where else can i check?