Hi all
It seems that issue has been fixed in next feature of 5.7.1
https://github.com/takayukister/contact-form-7/issues/1091
Workaround to applied for now: WP_DEBUG set to false or edit the block.json file by following this :
https://github.com/takayukister/contact-form-7/issues/1089
Dears
Same error on my client website. Any root cause and fix and just need to turn off the WP_DEBUG option to false ?