Unsupported context set error in FCS-QL query

```
/?query=[+word+=+"druh"+&+word+=+"typ"+]&queryType=fcs&startRecord=1&maximumRecords=10&recordSchema=http://clarin.eu/fcs/resource&x-fcs-context=cnc/corpora/syn2020
```
Please note that the FCS portal inserts corpus PID. I've already did a related update but in the FCS-QL mode it does not seem to work