Invalid UTF-8 start byte 0xa0 (at char #720, byte #37)

Question

I have installed hadoop-3.3.4 in Ubuntu 22.04.1 virtual machine using virtual box 7. I have configured the core-site.xml. But, it cannot run the format of namenode.

The code for core-site.xml is stipulated below

<configuration>
  <property>
     <name>fs.defaultFS</name>
     <value>hdfs://localhost:9000</value>
  </property>
</configuration>

But, the error is happened:

2023-01-15 21:39:44,393 ERROR conf.Configuration: error parsing conf core-site.xml com.ctc.wstx.exc.WstxIOException: Invalid UTF-8 start byte 0xa0 (at char #719, byte #37).

I wonder there is a bug in hadoop-3.3.4.