Problem with knime 5.2.1

Hi I have a problem with knime 5.2.1 I installed it I think correctly only that when I try to open a wkf I get this error “java.lang.IllegalStateException: Temp folder D:\TOSHARE\MKSAS\DT\work\knimeDQGRAFICIERRO15458 exists but is not writable” despite having write permissions on the D:\TOSHARE\MKSAS\DT folder can anyone help me out

Thank you