Hi @chirag.ashiyani ,
Welcome to SonarSource Community! 
Please add sonar.verbose=true to the extraProperties key in SonarQubePrepare task with Azure pipelines yaml and share the logs here.
If you want a quick solution that may not necessarily pertain to your problem, you can try this solution by setting sonar.scm.exclusions.disabled=true, but you should check your logs first.
Joe