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Internal Salesforce Error: 1566926586-42921 (-628992125) (-628992125)
Couldn't find any reason why this is happening, found just this old entry (5 years)https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjRwcb9me7WAhWKpo8KHTBkDVAQFgglMAA&url=https%3A%2F%2Fdeveloper.salesforce.com%2Fforums%2F%3Fid%3D906F000000090zcIAA&usg=AOvVaw2NNKDrkeUl8JoViIVsokaN and decided to reply to say this still happens. I just opened a case with Salesforce to see if they know what is going on.
But this happens on my Developer Org.
But this happens on my Developer Org.
This type of error indicates that an error has occurred that hasn't been trapped by the platform - a low-level java exception for example. All you can really do in terms of resolution is to file a support case with Salesforce and provide them the error ID that you are getting to get more information.
If you need to move quicker than, start removing functionality from the component to isolate where the problem occurs and see if there are any other mechanisms you can use.
You can follow a support case by following these [1] directions:
Please mark this as solved if the information helps.
Regards,
Nagendra.