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Cooper NewbyCooper Newby 

enable lightning experience internal error

I get an internal server error when I try to enable lightning experienceUser-added image
NagendraNagendra (Salesforce Developers) 
Hi Cooper,

May I request you please logout of all accounts and login once again by clearing the cache and browsing history.Which should probably fix the issue.

Still, if the problem persists may I suggest you give a try with a different browser and brand new developer org.

Please let us know still if you are facing the same issue so that we can look into it and fix the issue accordingly.

Hope this helps.

Mark this as solved if it's resolved.

Best Regards,
Nagendra.
Cooper NewbyCooper Newby
Still not functioning on this computer or two others even after loging out rebooting and clearing cache and cookies
Cooper NewbyCooper Newby
Also tried on another admins account, still broken