To collect the diagnostics output from GUI, follow below steps:
1) Click on the Administration as shown below:
2) Click on the SYSTEM ADMIN tab and Click on the "Logs and Diagnostics" in the left side pane as shown below:
3) Click on the "Generate diagnostic files" button,
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4) It will take some time depending on the size of the diagnostics output and you may download the file once it is generated and upload the diagnostics.zip file to SR directory.