WAGO 750-8202 "Terminal at postition 5 not supported"

[kasjo]

I have a WAGO 750-8202/025-002 controller and about 10 modules (inputs, digital and analog outputs, encoder inputs)
If I connect 4 modules it's ok, after connecting the next ones the controller goes into stop and displays the message "Terminal at position 5 not supported". The I/O diode flashes 7 times and then 5
I tried all combinations of modules, all work correctly if I don't exceed 4 pieces.
What could be the cause of this behavior?
I use codesys 2.3

EDIT:
I got a reply from Wago support that this PLC supports a maximum of 4 modules. Some budget version.