"call to a member funktion addstylesheet() on null" after paypal-payment

-- HikaShop version -- : 4.7.5
-- Joomla version -- : 4.3.4
-- PHP version -- : 8.1
-- Browser(s) name and version -- : Edge
-- Error-message(debug-mod must be tuned on) -- : call to a member funktion addstylesheet() on null

Hello

I configured the new plugin PayPal (in sandbox mode for now).

For payment by card, no problem.
But for settlement by PayPal account, I have a blank popup opening (saying "about:blank#blocked"). If I close this popup, then I have the expected window to PayPal.

Do you have any idea where this blank pop-up of content comes from?

Thanks in advance for your help.

Martin

Hi,

You already found another thread talking about the blank popup. Changing the "Cross-Origin-Opener-Policy" setting of the HTTP Headers system plugin should fix the problem.

Regarding the error "call to a member funktion addstylesheet() on null", we'll need the full error message to be able to tell you what to do. Please activate the "debug" setting of the joomla configuration page and try again. You'll see the full error message. Please provide a new screenshot of what you see on the page.

Hi Nicolas,

thanks for the tip with the settings of the http headers: it worked!

The error "call to a member function addstylesheet() on null" still exists. Attached are the screenshots as requested. Maybe it's because of jevents?

Many thanks
Martin

Hi,

The error is in JEvent RSVP Pro. You need to contact their support and report the issue with the screenshots you provided here. They should be able to tell you what to do.