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Devanshu soodDevanshu sood 

An internal server error has occurred Error ID: 1220414227-111201 .

I am getting this error while enabling lightning experience
Best Answer chosen by Devanshu sood
NagendraNagendra (Salesforce Developers) 
Hi Devanshu,

Are you system Admin? In past, I also faced the same issue. You can clear browser cache and history and then again login to your account then give a shot and let me know if having another issue.

Still, if the problem persists please give a try by attempting the same in a brand new developer org which should probably resolve the issue.

Please mark this as solved if it's resolved.

Best Regards,
Nagendra.

All Answers

NagendraNagendra (Salesforce Developers) 
Hi Devanshu,

Are you system Admin? In past, I also faced the same issue. You can clear browser cache and history and then again login to your account then give a shot and let me know if having another issue.

Still, if the problem persists please give a try by attempting the same in a brand new developer org which should probably resolve the issue.

Please mark this as solved if it's resolved.

Best Regards,
Nagendra.
This was selected as the best answer
Devanshu soodDevanshu sood
thanks