Some error occurred at server

When attempting to use the OCR API, I get the following error, but the status page says everything is fine.

opening connection to
starting SSL for
SSL established
<- "POST /parse/image HTTP/1.1\r\nAccept-Encoding: gzip;q=1.0,deflate;q=0.6,identity;q=0.3\r\nAccept: */*\r\nUser-Agent: Ruby\r\nContent-Type: multipart/form-data; boundary=-----------RubyMultipartPost\r\nContent-Length: 73441\r\nConnection: close\r\nHost:\r\n\r\n"
-> "HTTP/1.1 500 Internal Server Error\r\n"
-> "Cache-Control: no-cache\r\n"
-> "Pragma: no-cache\r\n"
-> "Content-Length: 107\r\n"
-> "Content-Type: text/plain; charset=utf-8\r\n"
-> "Expires: -1\r\n"
-> "Server: Microsoft-IIS/10.0\r\n"
-> "X-AspNet-Version: 4.0.30319\r\n"
-> "X-Powered-By: ASP.NET\r\n"
-> "Date: Thu, 17 Oct 2019 00:24:57 GMT\r\n"
-> "Connection: close\r\n"
-> "\r\n"
reading 107 bytes...
-> "Some error occurred at server. Please try again later. Please contact administrator if the problem persists"
read 107 bytes
Conn close

This appears to be a bug in the Ruby gem you link to from your website.