PHP errors with WP 5.3
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Hello,
we just upgraded our site to WP 5.3 and we had the following PHP errors in the backend.
The first error also appears in the front end.Deprecated: Non-static method Smackcoders\FCSV\SmackCSV::show_admin_menus() should not be called statically in /home/racedire/tst.racedirectorshq.com/wp-includes/class-wp-hook.php on line 288
Deprecated: Non-static method Smackcoders\FCSV\SmackCSV::testing_function() should not be called statically in /home/racedire/tst.racedirectorshq.com/wp-includes/class-wp-hook.php on line 288
Warning: Cannot modify header information – headers already sent by (output started at /home/racedire/tst.racedirectorshq.com/wp-includes/class-wp-hook.php:288) in /home/racedire/tst.racedirectorshq.com/wp-includes/functions.php on line 5946
Warning: Cannot modify header information – headers already sent by (output started at /home/racedire/tst.racedirectorshq.com/wp-includes/class-wp-hook.php:288) in /home/racedire/tst.racedirectorshq.com/wp-admin/includes/misc.php on line 1252
Warning: Cannot modify header information – headers already sent by (output started at /home/racedire/tst.racedirectorshq.com/wp-includes/class-wp-hook.php:288) in /home/racedire/tst.racedirectorshq.com/wp-admin/admin-header.php on line 9
After deactivating all our plugins one by one, we found out that these errors disappear when we deactivate WP Stripe Checkout Plugin and reappear after we re-activate it.
Thank you,
Elias
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