Calendar Base Error

Message: Missing or wrong parameter. The event you are looking for could not be found.

Note: Please verify your URL parameter: tx_cal_controller[uid]

MoDiMiDoFrSaSo
26 2728 29 30 31 01
02 03 04 05060708
09 10 11 12 13 14 15
16 17 18 19 20 2122
23 24 25 26 27 28 29
30 01 02 03 04 05 06