Hello, I am not sure if I am writing in the correct place as I do not see between the topics of the forum this extension plugin.
I see this error when i use Login as plugin:
Failed to start the session because headers have already been sent by "/home/dmware63/public_html/plugins/j2store/app_subscriptionproduct/app_subscriptionproduct/models/appsubscriptionproducts.php" at line 1.
Is the problem related to that plugin creating conflict with this one or there is a problem in this plugin?
What it means is that your j2store/app_subscriptionproduct plugin is echoing data before Joomla outputs data.
Because it says "at line 1" I'm guessing that there's a space or a newline or something before the <?php at the beginning of that file. "<?php" should be the first 5 characters of the file. No spaces, newlines, or any other character should be before the opening <?php.
It's definitely a bug - in the j2store plugin file