For the last few days I've been getting this message from the Sandbox API when trying to list products for sale. Also, when logging into the sandbox account and trying to view products for sale the page is never loading properly. There's nothing on the API status page to suggest a problem though - any ideas what's going on?

Everything was working normally before this error and there's been no changes to our code to cause the issue as far as I can see.

An example of the full response is:

 AddFixedPriceItemResponseType {#8311 ▼
   -values: array:5 [▼
     "Timestamp" => DateTime @1560499534 {#8307 ▼
       date: 2019-06-14 08:05:34.703 +00:00
     }
     "Ack" => "Failure"
     "Errors" => RepeatableType {#8328 ▼
       -data: array:1 [▼
         0 => ErrorType {#8320 ▼
           -values: array:5 [▼
             "ShortMessage" => "Sorry, something went wrong. Please wait a moment and try again."
             "LongMessage" => "Sorry, something went wrong. Please wait a moment and try again."
             "ErrorCode" => "10007"
             "SeverityCode" => "Error"
             "ErrorClassification" => "RequestError"
           ]
           -attachment: array:2 [▼
             "data" => null
             "mimeType" => null
           ]
         }
       ]
       -position: 0
       -class: "DTS\eBaySDK\Trading\Types\AddFixedPriceItemResponseType"
       -property: "Errors"
       -expectedType: "DTS\eBaySDK\Trading\Types\ErrorType"
     }
     "Version" => "1107"
     "Build" => "E1107_UNI_API5_18970402_R1"
   ]
   -attachment: array:2 [▼
     "data" => null
     "mimeType" => null
   ]
 }