Welcome to our Microsoft Q&A platform!
You can try to adjust the level of detail of the log file:
Tools->Options->Projects and Solutions>Build and Run->Change "MSBuild project build output verbosity" to
Also, when you choose to compile UWP apps with .Net Native, check out this document, which mentions some unsupported APIs. If you use these APIs, it is recommended not to use .Net Native for project compilation.
Regarding the inability to insert XML Code, check out this linked solution