A server error occurs when using Research and Engineering Studio.

Question

Hello, I am a junior in-house AWS developer. 
I am currently a junior-level developer, and there are only two people on the team, my colleague and I, and there is no one with AWS experience to ask for advice, so I am leaving this post here.

Please help me as I earnestly ask for help in this difficult situation.
Currently through the link below

https://docs.aws.amazon.com/res/latest/ug/deploy-the-product.html

Research and Engineering Studio has been deployed successfully.
**However, when I try to use Virtual DeskTop after connecting via DNS, I only see a Server Error message.**
![Enter image description here](/media/postImages/original/IMy1OJAB4GRVqr0lW3KqDY-A)

We are having difficulty knowing where and how to check and resolve the Server Error in this area.

**If anyone has used Research and Engineering Studio or knows the concept, it would be of great help to us if you could provide a solution or a link.**

Please help.
Thank you very much for reading this long post.

cloudyy · Answer

At very high level here are some reasons you might see a "Server Error" message:

1/ Incorrect parameters: If any of the parameters during the deployment were incorrect, you might need to delete and redeploy the RES environment.

2/ Networking or Active Directory mismatch: Confirm that your networking and Active Directory configuration matches what's required by AWS. This includes verifying that your infrastructure instances have successfully joined the Active Directory.

3/ CloudFormation stack deletion error: If there's an error with a dependent object when deleting the CloudFormation stack, it could prevent the environment from being deleted. This might happen if you launched an EC2 instance into a RES-created subnet or security group using the AWS console.

If you're still facing issues, I recommend referring to the AWS documentation on Installation issues for troubleshooting steps. https://docs.aws.amazon.com/res/latest/ug/installation-issues.html

A server error occurs when using Research and Engineering Studio.

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