Also getting this randomly:
Use of undefined constant BASE - assumed ‘BASE’ (this will throw an Error in a future version of PHP)
ee/legacy/core/URI.php, line 333
Cannot modify header information - headers already sent by (output started at ee/legacy/core/Exceptions.php:120)
ee/legacy/libraries/Functions.php, line 393
I see another user submitted something similar:
I also can’t add any ignore urls.