Dropbox API application stopped working with 403 error

Hi Greg,

  This is diagnostic output from our embedded application when this transpires.  I have redacted the API keys.

-- Diagnostic output starts here --

00:00:08.0992] Device IP Address is 192.168.1.121
[00:00:10.0061] FLASH: System State stored to flash
[00:00:10.0065] Starting OTA Update from 1.18.0
_ReadStatFile: ERROR in sl_FsOpen, status=-11
sl_extLib_OtaRun: call OtaClient_ConnectServer OTA server=api.dropbox.com
OtaClient_ConnectServer: http_connect_server api.dropbox.com
sl_extLib_OtaRun: OtaClient_UpdateCheck, vendorStr=1.18.0
OtaClient_UpdateCheck: call http_build_request /1/metadata/auto/
metadata file=/1.18.0/f80_sys_mcuimgA.bin, size=136464
sl_extLib_OtaRun: OtaClient_UpdateCheck, numUpdates=1
sl_extLib_OtaRun: OtaClient_GetNextUpdate: file=/1.18.0/f80_sys_mcuimgA.bin, size=136464
OtaClient_ResourceMetadata: call http_build_request /1/media/auto
OtaClient_ResourceMetadata: file flags=80,metadata flags=80
sl_extLib_OtaRun: ResourceMetadata CDN file URL = https://dl.dropboxusercontent.com/1/view/eeeeeeeeeeeeeee/1.18.0/f80_sys_mcuimgA.bin
_ReadFileHeaders: domain=dl.dropboxusercontent.com, file=/1/view/eeeeeeeeeeeeeee/1.18.0/f80_sys_mcuimgA.bin
_ReadFileHeaders: skip http headers
http_skip_headers: http error code HTTP/1.1 403
_ReadFileHeaders: ERROR, http_skip_headers, status=-1
CdnClient_ConnectByUrl: ERROR, _ReadFileHeaders, status=-1
sl_extLib_OtaRun ERROR: Failed on CdnClient_ConnectByUrl
[00:00:14.0468] OTA run = -6
[00:00:14.0471] OTA: Error with OTA Server

-- Diagnostic output ends here --

The code that performs this update is located in a library provided by Texas Instruments.  No code has been changed in this file or the one calling it in several months.

Thanks for any help.

Vic