Can't install

It’s an error file stored on your server…your host may have access to it via a cPanel or a link in the WordPress admin.

Thanks. I just followed the instructions here to make sure one is being created (https://www.elegantthemes.com/blog/tips-tricks/using-the-wordpress-debug-log ) and so far I am unable to locate it on the server. Filezilla is still searching…

Ok – Filezilla finished searching for debug.log as noted on that link I just pasted above and didn’t find one, so apparently my adding those 3 lines to my wp-config.php to create one didn’t work. Hmm. I’m happy to try to continue to help if anyone can guide me into how to create this log file…

I’m also still getting the invalid header issue when I try to activate the plugin. No error log entry on the server, but I’m getting this error in the Chrome console: Failed to load resource: the server responded with a status of 500 (Internal Server Error) https://testdomain.com/wp-admin/plugins.php?action=activate&plugin=constant-contact-api%2Flib%2Fcache-http.php&_wpnonce=6170b8db88

I’m happy to provide any other information that might help you.

Thank you @celestinaadams! I think this is the problem. I’m releasing a fix soon. Please let me know if the next update doesn’t solve the problem.

Glad to help, and I look forward to the update. Could you post here when it’s ready, so I know to go looking for it?

This was just released with 3.1.11. Please confirm it works.

Yes, that fixed it. Thank you!

Wahoo! Thanks for the help in debugging the problem. Servers and websites are so strange.