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Newsletter signup errors after WordPress core update

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Occasional Organizer

Newsletter signup errors after WordPress core update

Hello,

 

I have a WordPress site that was recently upgraded to 3.7.1. After which, their Constant Contact newsletter signup stopped working. It is producing the following errors:

 

Warning: strpos() expects parameter 1 to be string, array given in /home/loadaf5/public_html/constantcontact/cc_class.php on line 437

Warning: Cannot modify header information - headers already sent by (output started at /home/loadaf5/public_html/constantcontact/cc_class.php:437) in /home/loadaf5/public_html/constantcontact/signup/index.php on line 68

 

Any suggestions on what might be causeing the error or troubleshooting steps?

 

They seem to have used the CCSFG: Constant Contact Signup Form Generator.

 

Thanks in advance.