As I and others mentioned in your previous posts, please create and post a Ranorex snapshot of the element in question. This would make the things easier for us to understand the source of your problem and provide adequate help. If you are not able to create the snapshot manually, you can always create it from recording, by adding new action, select log action and then set the action parameters as described below...
Once you run recording, there should be created new snapshot in report output dir.
In my opinion, the problem is in nonprintable characters at the end of each line. On windows, it's typically \r\n (return and new line). I don't know about Android. My guess is that there is either missing, different or redundant character in toast or validation text.
BTW, in the error message you posted, there seems to be a redundant quotation mark at the end of expected text. Please check the definition of validation step, if there is no such character included? And if here is such character, remove it