A field that allows the user to enter path.PathField — Granite UI 1.0 documentation

Do you see anything relevant in dispatcher logs ?

I do not believe the server is available during an upgrade installation but during the routine maintenance e.g. workflow purge, DataStore Garbage Collection, ..etc Ideally you should not let any access. You can block access via dispatcher.

Are you referring to Coral Datepicker ? Could not see anything in the documentation.Documentation | CoralUI

Check the following post:Delete Dam Asset Workflow

Adding to what Leo indicated, also make sure the .dll file is accessible

Can you clarify the following:1. the same username is used when bypassing dispatcher i.e. using IP and port number2. you are able to see the full repository tree when using IP and port number

From what you said it seems that it might be blocked at dispatcher ... I don't think you need to enable it just check the dispatcher config file to ensure its not blocked. You may have an entry similar to this that block access to CRX and CRXDE Light using filter rule: /ruleLabel{/glob "* /crx*"/typ...

Can you clarify when this happens ? When opening the page ?

Can you verify if the same query written in SQL2 would output the results with proper ordering ? Is this isolated to XPATH ?