File upload error code 500

"Authorization": 'Bearer '+ key,
      "Dropbox-API-Arg":{"path":"/home/yes.pdf","mode":"add","autorename":true,"mute":false,"strict_conflict":false},
      "Content-Type": "application/octet-stream"

Above the header i am giving.

URL i am using is: 

https://content.dropboxapi.com/2/files/upload  

 Here is the pdf from base_64 to utf_8 (partly) 

%PDF-1.3
%����
1 0 obj
<</Type/Catalog/Pages 4 0 R/Lang(en-US)/Names 3 0 R/Metadata 5 0 R>>
endobj
2 0 obj
<</Producer(http://bfo.com/products/report?version=1.1.61-r25714)/CreationDate(D:20180703053256-07'00')/ModDate(D:20180703053256-07'00')>>
endobj
3 0 obj
<</Dests 6 0 R>>
endobj
4 0 obj
<</Type/Pages/Kids[7 0 R]/Count 1>>
endobj
5 0 obj
<</Type/Metadata/Subtype/XML/Length 875>>stream
<?xpacket begin='' id='W5M0MpCehiHzreSzNTczkc9d'?>
<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="BFOXMP 1.1.61-r25714"><rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"><rdf:Description xmlns:pdf="http://ns.adobe.com/pdf/1.3/" rdf:about=""><pdf:Producer>http://bfo.com/products/report?version=1.1.61-r25714</pdf:Producer></rdf:Description><rdf:Description xmlns:xmp="http://ns.adobe.com/xap/1.0/" rdf:about=""><xmp:CreateDate>2018-07-03T05:32:56-07:00</xmp:CreateDate><xmp:ModifyDate>2018-07-03T05:32:56-07:00</xmp:ModifyDate><xmp:MetadataDate>2018-07-03T05:32:56-07:00</xmp:MetadataDate></rdf:Description><rdf:Description xmlns:dc="http://purl.org/dc/elements/1.1/" rdf:about=""><dc:date><rdf:Seq><rdf:li>2018-07-03T05:32:56-07:00</rdf:li></rdf:Seq></dc:date><dc:format>application/pdf</dc:format></rdf:Description></rdf:RDF></x:xmpmeta>
<?xpacket end='r'?>
endstream
endobj
6 0 obj
<</Names[(page1)8 0 R]>>
endobj
7 0 obj
<</Type/Page/MediaBox[0 0 612 792]/Resources<</ColorSpace<</DefaultRGB 12 0 R>>/ProcSet[/PDF/ImageI/Text/XObject]/XObject<</R1 11 0 R/R3 13 0 R>>/Font<</R2 14 0 R/R4 16 0 R>>>>/Contents[9 0 R]/Parent 4 0 R/Annots 10 0 R>>
endobj
8 0 obj
<</Type/Action/S/GoTo/D[7 0 R/XYZ 0 792 0]>>
endobj
9 0 obj
<</Filter/FlateDecode/Length 1748>>stream
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