I did not know what is the problem in this case, but i see this problem again and again in this forums. But sadly i found no answer to fix this..

so, i explain what happend on my testsite:

create objekt, capacity 1.
create reservation type.
create price.
--
open this object in frontend --> i could select date.
klick on next month --> no possibility to select date and after that i have no chance to select a date again.

I hope, you get in touch with me because the component is not working and i dont want to see my 49,- Euros and the time i work on this blows away. Maybe there are many other waiting for a fix for this too.

ask me for login details and link, you get a pm then.

So, after reading again some of the threads with the same(!) problem i think it has to do with free and paid version. i realized, my problem occurs now, after i purchase the paid one.