Chemical Reaction kinetics, error

Hi,
this is my first try on Comsol, I am modeling the reaction kinetics of a monolith reactor, using plug flow model for a single channel. there are 3 reactions and 8 components. 2 reactions are at equilibrium and one is irreversible.

I get this error:

Invalid property value.
- Property name: callblevel
- Valid value: One of the strings "nonlin" "optim" "param" "refine" "time".
or a cell vector of such strings. Upper case may be used.
The strings may be abbreviated as long as they uniquely determine
one of these strings.

I do not know which property is this 'callblevel' and how to fix the error.
does anyone know about this error?

Best,
Zari