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 27 282930 31 01
02 03 04 05 06 07 08
09 10 11 12 13 14 15
16171819202122
23 24 252627 28 29
30 01 02 03 040506