An error of type E_ERROR was caused in line 48

I inherited maintenance of my local car club site. I’m new to WP. I’ve been trying to update us from WP 5.7 to 6.1.1. After de-activating all plug-ins, updating WP, then one by one re-activating each plug-in. It appears the " Gravity Forms User Registration Add-On" is making the site crash. I then get this admin email with details below. Any help would be deeply appreciated
…Error Details

An error of type E_ERROR was caused in line 48 of the file /home/customer
/gravityformsuserregistration/includes/class-gf-page-choice-walker.php. Error message:
Uncaught Error: operator not supported for strings in /home/customer
Stack trace:
#0 /home/customer/www/ GF_Page_Choice_Walker->start_el(‘’, Object(WP_Post), 0)
#1 /home/customer/www/ Walker->display_element(Object(WP_Post), Array, 9, 0, Array, ‘’)
#2 /home/customer/www/
/gravityformsuserregistration/class-gf-user-registration.php(2238): Walker->walk(Array, 9)
#3 /home/customer/www/
GF_User_Registration->get_pages_as_choices(‘Select a Page’)
#4 /home/customer/www/

It sounds like you have out of date plugins running. Do you have the ability to get a system status report?

If so, please post that here. If you don’t have that option, your Gravity Forms version is outdated. Please check all your Gravity Forms plugins (and any plugins not created by us that integrate with Gravity Forms.) Thank you.

Hi Chris, First off, thanks for replying. looks like I on Gravity Forms version 1.9.19 and Gravity Forms User Registration Add-On 3.3. From what I can tell there is no way to update those without paying a yearly fee. Is that correct? Otherwise another person suggested switching to “Ultimate Member” plug in since we don’t have much of an operating budget

You will need a valid Gravity Forms license in order to download any Gravity Forms plugins. The Gravity Forms license is an annual subscription. You will need the Elite license in order to update the User Registration Add-On. If you have any other questions, please let us know.

Gravity Forms licensing reference:

This topic was automatically closed 30 days after the last reply. New replies are no longer allowed.