404. That’s an error.
The requested URL /_/+1/confirm?hl=de&url=http%3A%2F%2Fohlsdorf.ooevp.at%2Findex.php%3Fid%3D5314%26tx_cal_controller%255Bview%255D%3Devent%26tx_cal_controller%255Btype%255D%3Dtx_cal_phpicalendar%26tx_cal_controller%255Buid%255D%3D11815%26tx_cal_controller%255Byear%255D%3D2019%26tx_cal_controller%255Bmonth%255D%3D11%26tx_cal_controller%255Bday%255D%3D06%26cHash%3D50a0231d4a1d5afe67a73e426027054b
was not found on this server. That’s all we know.