Article 3.1.2A : Electricity bill not generated when we select "ALL".

Article 3.1.2A : Electricity bill not generated when we select "ALL".

Problem Report: Bill is not generating when we select ALL.

Observations:

1- Bill were generating till last previous month for All option in Bill tab.
2- From This month reported problem is observed
3- Bill are generating sometimes & sometimes it is not generating. It is showing error kindly refer attached screenshot(ATS Pristine 1).

Action Taken :

1. Shown this issue to design team,they suggest to use wait option in page response tab.

Same was working fine but now we are facing same issue. 

2. Cached memory cleared
3. System restarted
4. Service restarted 
5. Google chrome is up to date Version 74.0.3729.131 (Official Build) (64-bit)
6. We tried to generate bill using internet explorer same issue has been observed.
7. April month bill is generated & given to their accounts team. Now they are worried about May month bill generation because they are facing same issue repeated.  
8. Due to google chrome update this has been observed & it is working fine as of now with Ver71.
9. We have disable Google chrome update.