Object Reference not set to any instance of any object

If you get this issue when sending Signal to APIBridge, it means you are sending something wrong in format of the Signal, which cannot be matched with Symbol Settings. In order to solve this issue:

1. Use only one or two rows in Symbol Settings, and check whether every value in Symbol Settings is correct.
2. Send signal without any variables, as per examples given here

Two issues listed below can be solved by following the above steps:

1. Input String was not in correct format
2. Attempt to Divide by Zero