Error when running my extension

notes = Browser: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/ Safari/537.36 Edg/118.0.2088.61
foundIn = nb194c
faultData = Exception caught: For input string: ""

We would need to know more about the extension in question. Generally, App Inventor should be fine with parsing empty strings unless you've specified a property type that doesn't accept empty strings as the default value (e.g., non-negative integer or color editors).