program logo in MetaEditor turns yellow, and can't run strategy tester

 
If the program logo in MQL5 MetaEditor has turned yellow and it's not accepting tests, it indicates that there might be an error or issue with your code changes. When the logo turns yellow, it means that there are warnings or errors in your code. ? any idea
 
Mamoon Said A Tayyem: If the program logo in MQL5 MetaEditor has turned yellow and it's not accepting tests, it indicates that there might be an error or issue with your code changes. When the logo turns yellow, it means that there are warnings or errors in your code. ? any idea

Any idea about what?

Your question is very unclear and confusing.

Please explain in more detail and use screenshots.

Reason: