Thank you for your answer, i use version 1.4.24.
I used chrome to test it on my ipad and the same thing happened a blue line.
it also says that “warning the theme is not tested by the plugin, “ so maybe that is the problem I use theme Donovan.
i have no other plugin ins, only the calender.
but the strange thing is that it is working on my ipad (safari) and my laptop (chrome browser), so I thought maybe it is the chromebrowser, but that is working good on my laptop.
sorry for my bad english , i hope you understand everything.
Is there anything else i could try to do?