HTTP Status 500 - Request processing failed; nested exception is java.lang.NullPointerException

Tags: #<Tag:0x00007f29a14c3e80>

Hello friends, Have encoutered a runtime exception while i was creating a cohort report form. Have recognised the problem may be in my tomcat but could not understand exactly where the problem may arise from. here is a pastebin link cc @mozzy, @dkayiwa

have you made any code changes any were?

No havent made any code changes

could this be help

thanks @herbert24 thats the procedure i was following in creating a cohort report but got that error logs in the above pastebin

there is something i have realised just now into the error logs of my tomcat, what could be the problem, this is tomcat logs thanks