There seems to be an issue with your attachments. As David pointed out, try to attach your images directly to the text editor instead of adding them separately as attachments, as the forum does very strict checks on attachments, which sometimes takes hours to reflect.
As for your issue, I think it is very clear what's happening based on your error message. It seems you are using an expression that has the contains() function, and the contains() function expects two parameters, i.e., a collection and an item. The collection can either be a dictionary, an array, or even a string, with the items being a key, an object/element, and a character/substring, respectively.
Your error states that you used a string and an integer for the parameters of your contains() function, which is not allowed. I am assuming you are trying to find a character or a substring within a longer string. Something like: contains('Physics 101', 101), which is erroneous because the second parameter is an integer.
The solution is to wrap your second parameter in single quotes. It would then successfully search the original string for whatever you are trying to find in it. E.g., contains('Physics 101', '101')
Let me know if this resolves your issue. If it doesn't, try to also attach your screenshots in the text editor so we can help you debug properly.
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