Error 500 in WordPress 6.4.1

After updating the WordPress version from 6.3.1 to version 6.4.1 and mailpoet from 4.31.1 to 4.36.0, I get error 500. After deactivating mailpoet there is no error. Returning to the old version of mailpoet does not help. Clearing browser history and cache does not help. There is an error only if I logged in to WordPress on my website (<em>[ redundant link deleted ]</em>), otherwise there is no error.
Now mailpoet is deactivated; if activated, the error appears: “This page isn’t working
ozma-yeudit.com is currently unable to handle this request.
HTTP ERROR 500″.