Faild in compiling with conan

[Deyujonney]

I am following the "How to compile" to compile BT.CPP. When I use "conan install ../BehaviorTree.CPP --output-folder=. --build=missing", I get the following errors:

ERROR: There are invalid packages:
gtest/1.14.0: Invalid: 'settings.compiler' value not defined
sqlite3/3.40.1: Invalid: 'settings.compiler' value not defined
libsodium/1.0.19: Invalid: 'settings.compiler' value not defined
zeromq/4.3.4: Invalid: 'settings.compiler' value not defined

The version of conan is 2.4.1.

I am new to this. Any help is deeply appreciated.