Sergio, it would be much easier to troubleshoot this if you expanded the stack-traces on the page and copied their text into email. The wealth of the information needed to debug the issue is in there.
That said, this is a very strange error to see on the root of the XMLUI. Is this a clean install, or an upgrade/migration? The class generating that error is not very big and *might* suggest that there is an underlying database issue at fault here.
Senior Software Engineer
Technology Research & Development
I had a problem with the XMLUI interface after the installation, I don't get to run DSpace with XMLUI interface, I don't know what happen, maybe someone already solved, thank you very much for your help. (the version is 1.6.2)
You can see my problem through these screenshots (I put them on blogspot).
Hola a todos
He tenido un problema con la interfaz xmlui, luego de hacer la instalación no logro hacer funcionar dspace con la interfaz xmlui, no sé a qué se debe este problema, quiza alguien ya lo soluciono, les agradezco enormemente su ayuda.
Pueden ver mi problema a través de estos pantallazos (los puse en blogspot).