I've installed gmap module and configured it so that I'm using custom markers. It worked well till today (I've re-deploy website).
I'm able to choose my custom marker 'Accountant' in a settings (see screen below).
However when I load map I get an error message: "Request for invalid marker set"
I've googled it and did not find a clear explanation what is wrong.
Please advise what could be an issue.