Cannot save new or changed writer documents,file not found

Just downloaded 64 bit version (6.1.0.3) of LibreOffice for my Windows 10 os desktop . Created a new document then tried to save it (during creation -save, and upon exiting LibreOffice -save as), using the assigned document name, as well as,creating the document name I want . Also tried different extension (ie. docx and pdf),all with the same result -“File not Found. Check the file name and try again” What am I doing wrong ? Never had this problem with previous versions . Thanks in advance for your assistance .

Look here
, there are the answers you are looking for.