cannot download pendency start with org.crossmobile

The repo url： https://mvn.crossmobile.org/content/repositories/crossmobile/  is 404

and maven returns ：

~~~
Could not transfer artifact org.crossmobile.ca.androidx.core:core:jar:1.3.0 
from/to maven-default-http-blocker (http://0.0.0.0/): 
Blocked mirror for repositories: 
[crossmobile (http://mvn.crossmobile.org/content/repositories/crossmobile/, 
default, releases+snapshots)]
~~~