[Typo3] Undefined property: jumpurl

[Igor Timofeev]

What is this, my fist page shows "
Page is being generated.
If this message does not disappear within 30 seconds, please reload. "
And it seems like has no end. Setting in index.php error_reporting (E_ALL)
shows: Notice: Undefined property: jumpurl in
/usr/local/www/kontinent/typo3_src-3.7.0/typo3/sysext/cms/tslib/class.tslib_
fe.php
on line 2378

I don't know where it come from, because site was up and go some days before
this happens.

Help please.