Invalid Parameter on generating reports

Hello together,

i use FortiPlanner Light 2.6.5 B0403.

If i try to generate an Report, including 5GHz, i get an log-message with "invalid parameter". If OAPs are included i get the same error (also with only 2,4GHz).

In this case, report will not be generated!

Anyone know where can i find more details to this error? Is there an Debog-Log or anything including more details.

Thank you very much,

Bastian