GET method not allowed

GET method not allowed

I just installed a third party app for Android called Carmel Sales Call Logger. It is supposed to log calls automatically to Zoho when I finish a call. I have the correct API key entered but now I am getting the following error:

" Error Logging Call – Failed to log into CRM. GET method is not allowed for this operation."

Does anyone have any idea why I am getting this and how I can fix it? Thank you.

Kyle