I'm trying to create a new campaign via API, here is the relevant code (Python): ######################################################################################################## # Create a campaign with custom html ######################################################################################################## #read in the custom html with open("HTMLEmailTemplate-Default.txt", "r") as file: html_content = file.read() # define the necessary details to create the campaign, note format type=5 is custom coded email campaignDetails = { "name":"Test-Campaign1", "email_campaign_activities":{ "format_type":"5", "from_name":"test-constantcontact", "from_email":"test-constantcontact@ablt.ai", "reply_to_email":"test-constantcontact@ablt.ai", "subject":"test subject line", "html_content": html_content } } def createCampaign(access_token,campaignDetails): url = 'https://api.cc.email/v3/emails' headers = { 'Authorization': f'Bearer {access_token}', 'Content-Type': 'application/json' } json_data = json.dumps(campaignDetails) response = requests.post(url, headers=headers, data=json_data) if response.status_code == 200: campaign = response.json() return campaign else: print(f"Error: {response.status_code}") print(response.json()) return None createCampaign(access_token,campaignDetails) campaigns=getCampaigns(access_token) print(campaigns) I do get a printout of the existing campaigns but the creation of the new on fails with the following error: Error: 500 [{'error_key': 'http.status.error_unknown', 'error_message': 'Internal Server Error'}]   Which seems to be a problem on the Constant Contact side but I'm not sure what the issue might be, any ideas? ... View more