In your config file, comment the following lines if they are not commented:

unbind dcc n tcl *dcc:tcl
unbind dcc n set *dcc:set

Check the value of must-be-owner. If it’s equal to 1 (default), check that you are well setted as permanent owner (set owner “nick”). The value in owner must be your handle.

Then, you’ll be able to use .set errorInfo (with capital I).