Add OpenStreet Map Library
First of all, you need to add OpenStreet Map Library.
You can do it by performing following steps:
Step 1: Go to TYPO3 Template Module > Select the page in which you want to configure the OpenStreet Map Extension.
Step 2: Go to the Constant Editor.
Step 3: Choose OpenStreet Map plugin from the Category dropdown box.
Step 4: Now, add OpenStreet Map Library key on the “Others” Setting.
Now you can Save the changes & use it on your awesome website.!