Issue when using shortcode, upgrading level

[Jonas]

Hi,

I get this error message when clicking on the button which is created with the shortcode below.

“Warning: Cannot modify header information – headers already sent by (output started at /home/campusr8/public_html/klubbdansa.se/wp-content/themes/tclub/header.php:2) in /home/campusr8/public_html/klubbdansa.se/wp-includes/pluggable.php on line 1216″

Shortcode I use:
[swpm_update_level_to level=”3″ button_text=”Klicka här för att vara med i en arbetsgrupp.” redirect_to=”https://klubbdansa.se/?page_id=66″%5D

So it never redirects to the correct page, instead it shows the error message.

I have installed both addons, and use the shortcode described on this page: https://simple-membership-plugin.com/simple-membership-miscellaneous-shortcodes-addon/

What can be wrong?

Best regards, Jonas

[mbrsolution]

Hi, can you carry out the following test. Can you test one of WordPress default themes like Twenty Seventeen? I think your issue is coming from your theme.

Thank you

[Author]

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