There are a few reasons why you may get an error when integrating TikTok Lead Generation with Salesforce Marketing Cloud:
Selecting anything other than TikTok Leads under App Exchange
Incorrect log in for TikTok Ads Manager
Service Timeout Error when you create a form connection
Error stating "ads.tiktok.com took loo long to respond"
To troubleshoot TikTok Lead Generation with Salesforce Marketing Cloud integration:
Ensure you are using Google Chrome.
Ensure that you don't have an ad blocker installed in your browser.
Turn off "Prevent Cross-Site Tracking" and "Block All Cookies" in your settings.
Try refreshing the page to see if the connection is created. If not, try connecting again as creating connections can take a long time.
Go to this URL to complete the installation starting from the App Exchange.
Review the steps on how to integrate TikTok Lead Generation with Salesforce Marketing Cloud.