Server Error Log Help

[Broadcaster]

Hello,

my knowledge level in the xenforo forum system is at beginner level and I need help with the problem I am encountering. Summary: Errors occur during the membership process on the www.kaynakci.com url link. Members cannot register. I am sharing the error messages I have displayed in the Xenforo admin panel so that you can help me better. Thank you in advance for your help.
Server Error Log Help

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