I have different warning error generated by SNAP model, please help me to solve it:
error (1) SNAP is unable to read xml data
error (2) I can’t display sentinel-2 data in SNAP interface
error (3) the sen2cor extension dosen’t work correctly
It is not easy to help with little information about your system, data, version…
Open S2 files via File > Import > Optical > Sentinel-2 > L1C and select the xml file in the folder above. It is named like S2A_OPER_MTD_SAFL1C_PDMC[…].xml_. Select a resolution then.
If step 1 is done you can open the data, make an image composite or work with individual bands.
Please open Tools > Manage external tools > Sen2Cor > Edit and post a screenshot of the tab System variables
For the first warning, it seems you are trying to open an xml file (*.aux.xml) which is not the product metadata file. Usually such files are produced after processing with other tools. Try to use the xml metadata file from the original product.