I use a query to generate the license: curl -u "user:password" "https://crm.innovatrics.com/api/license/generate/123.xml?hwid=a+rQ3MYV/9JLV=8¬e=RESTlicense"
and I am getting error code 500: "Error! hwid must be in base64 format without spaces..."
Using standard Base64 in URL requires encoding of '+', '/' and '=' characters into special percent-encoded hexadecimal sequences, i.e '+' becomes '%2B', '/' becomes '%2F' and '=' becomes '%3D'.
After you change a+rQ3MYV/9JLV=8 to a%2BrQ3MYV%2F9JLV%3D8 it should work.