Firebase Syntax error: quote in unquoted cell

My Firebase structure is like this

Not every time But sometimes it says

What would be the problem?

What's the data you received? set it to a Label, and show us.

and show your relevant blocks

The relevant project bucket of the above chat screenshot is below.. I mean i got the relevant data from firebase and works great but sometimes its shows the error.

You are not helping us to help you.

There is a problem in the data returned in the responseContent somewhere. Is this when you call a particular set of data with a particular projectBucket or tag ?

Get and paste back here the raw data from responseContent with data that you believe causes the problem.

Alternatively, check through all your data on firebase, to see if you can find the syntax error...