Appreciate the response, but this is, once again, a boilerplate response that doesn't do anything to solve what is a technical issue with the app itself. As mentioned in my first post, I have done all you suggest already, including contacting support multiple times and they just do the same thing: give boilerplate suggestions without ever doing anything to get the actual software improved, then call or email endlessly asking if it's been solved until I finally ask them to stop pestering me and just fix the problem.

One cannot deposit a check using QB Online - all it does is show the QR ode to download the app - so I'm using the QB Mobile App, and it's the same error from the beginning: 5 months: "Ooops, something went wrong. / Cannot deposit that check." The issue is not isolated and happens to many other people stuck using QB (just search "oops" on the community). This is not an issue customer support can solve with repeating suggestions, it's one that the developers must solve and I'm attempting to finally reach that level so Intuit will finally do something about it.