I have the latest versions of Craft CMS, Sprout Email and Craft Contact plugins. Sprout behaves fine with some notifications I have set up. However, if I submit a contact form it throws a PHP error -
mb_convert_case() expects parameter 1 to be string, array given
If I disable Sprout, then Contact Form works fine.
Looking at the logs, I see that submitting the form triggers a 'When an entry is saved' event and Sprout starts looking at whether it is something it should handle and then chokes when trying to parse it as an entry.
I finally got things to work by disabling the "Enable Sent Email tracking" feature in Sprout Email, but I would prefer not to have to do that.
Has anyone encountered anything like this or have any thoughts on this? Thanks for any input!