Symptoms
An order fails with the following error:
The last error - "Service Creation Failed: Platform error #error_code #-1, extype_id #-1, module_id #, invalid OAuth signature: SIGNATURE for url https://https://proxy:port/aps/2.2/resources/UID. Service Creation Failed: Platform error #error_code #-1, extype_id #-1, module_id #, invalid OAuth signature: SIGNATURE for url https://https://proxy:port/aps/2.2/resources/UID.".
Cause
The error was caused by misconfiguration. There was a difference in inbound proxy configuration between the following settings:
System > Settings > Integration > APS Connection: Proxy settings > Inbound proxy
and
Parameter proxy_set_header Host
in /etc/nginx/conf.d/aps-proxy.conf
on Dropbox proxy server.
Resolution
Match the aps-proxy.conf
entry with Provider Control Panel without the header.