Fix Errors on Opencart 3.0

Hello! The engine is Therefore 3.0.2.0.Russian Assembly. Worked great - no problems arose.

Now slowly began to work. Long page loads. When switching from admin panel on the main store for a very long time page is loaded (about 20 seconds) and in the browser there was such here is the link when switching from admin to main:

https://site.com/admin/index.php?route=tool/log&user_token=gUbRZfEXpMV3O6Q5sM8GMpXuUyDYwSBw

In the error log there is error: (log error attached)

No changes have been made. You need to check it and correct mistakes.

Thank you! Waiting for suggestions.