Fatal error: Cannot use string offset as an array in /var/www/kbhvineyard/typosite/kbhvineyard/typo3conf/ext/tl_conference/lib/class.cg_tracks.php on line 27

Call Stack:
    0.0000     636928   1. {main}() /t3hosting/typo3_src-4.4.7/index.php:0
    0.0002     638688   2. require('/t3hosting/typo3_src-4.4.7/typo3/sysext/cms/tslib/index_ts.php') /t3hosting/typo3_src-4.4.7/index.php:84
    0.5020   17037064   3. tslib_fe->INTincScript() /t3hosting/typo3_src-4.4.7/typo3/sysext/cms/tslib/index_ts.php:464
    0.5084   18329976   4. tslib_fe->INTincScript_process() /t3hosting/typo3_src-4.4.7/typo3/sysext/cms/tslib/class.tslib_fe.php:3202
    0.5152   18399944   5. tslib_cObj->USER() /t3hosting/typo3_src-4.4.7/typo3/sysext/cms/tslib/class.tslib_fe.php:3263
    0.5152   18400352   6. tslib_cObj->callUserFunction() /t3hosting/typo3_src-4.4.7/typo3/sysext/cms/tslib/class.tslib_content.php:809
    0.5153   18410000   7. call_user_func_array() /t3hosting/typo3_src-4.4.7/typo3/sysext/cms/tslib/class.tslib_content.php:6753
    0.5153   18410064   8. tx_tlconference_pi1->main() /t3hosting/typo3_src-4.4.7/typo3/sysext/cms/tslib/class.tslib_content.php:0
    0.5411   19520600   9. tx_tlconference_pi1->registrationForm() /var/www/kbhvineyard/typosite/kbhvineyard/typo3conf/ext/tl_conference/pi1/class.tx_tlconference_pi1.php:301
    0.5467   19558064  10. cg_tracks->renderForm() /var/www/kbhvineyard/typosite/kbhvineyard/typo3conf/ext/tl_conference/pi1/class.tx_tlconference_pi1.php:1627