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Can you tell me what instance are you accessing, the exact URL that you are using to access the Thingworx instance? From the picture that you have attached it is not clear.
In order to use the import/export feature you need to be an Administrator. This means that you have to be part of the Administrators group(which you are currently not). Please ask the owner of your instance(tan_siew_ling@nyp.edu.sg) to make you an Administrator also if you need to use the import/export feature. I suggest you use the Logs (specially the Application log) in order to see what type of problems you have when you are trying to execute, create, modify or delete any entity from Thingworx. In case the owner of the instance doesn't know how to make you an Administrator or doesn't know how to grant you the necessary permissions, I suggest using the Administrator Guide for Educators from the thingworx.com website in the Academic Program section(PTC IoT Academic Program | ThingWorx)
