Vus thrown out into Error column

Hi,

Currently i faced VUs thrown out into Error column after the VUs failed to initialzed with error message "Failed to initialized. Reason: Timeout"

I saw some poeple mentioned to increase the init timeout but still i faced the same issue.
 
May i check,
 
1) what will be the impact of increased the init timeout?
2) what are the root cause of the VUs failed to initialized and finally thrown into Error column?

3) Any log files for me to check on this issue on the LR i used?
 
Thanks.