Protocol Buffers - cannot resolve import/option


IntelliJ IDEA 2021.2 (Build #IC-212.4746.92)

Protocol Buffer plugin 212.4746.57

OSX 12.0.1

protoc 3.17.3

Since this version of IntellJ IDEA I got errors with my proto-files. 

import "google/protobuf/empty.proto"; - cannot resolve import
option java_package; - cannot resolve option

Settings inside Languages & Frameworks > Protocol Buffers look fine. All the paths are included.

No issue when I switch to the deprecated plugin 'Protocol Support'.