This issue is similar to mine, I also have a chip/contactless reader. I actually called square customer service to see if that would help, it did not.
In fact I learned a few things. The customer service agent walked me through several steps, we discovered that my app was fully updated, as it shows in google play store the date and time stamp that the app was last updated. We tried to updated it several different ways through the square app, none worked.
In the end what I learned from the customer agent was that there was nothing wrong with my apps at all and the issue was with the reader itself, the issue is with the technology inside the reader. Square's technology. The agent said square offers a warranty for (I think) 1 year when you buy it new, however my device was over 1 year old so I no longer had any warranty coverage. I mentioned to her that square never, not even once, offered me any extended warranty, not by email, verbally or any messaging system, nor was I ever told that the warranty would be ending on so and so date (not even out of common courtesy). Basically I was never given any opportunity whether I wanted the warranty or not. I asked her about square sending me a new contactless chip reader, she said not without the warranty (which I have none at this point), and if I wanted to use it I would have to buy a new one. I asked about getting a discount if I was to purchase a new one, she said no, I would have to pay full price again. It didn't matter that I already bought one that worked fine until their recent update and that it was their technology that failed.
Square readers are designed to last a certain amount of time (in my case just over 1 year). I never had any issue with it until the latest email blast about square unlocking the readers to accept debit card, tap and such through the contactless reader. As it has an insert part to it that never worked before, I guess, because square did not have permission to accept debit and such in Canada.
Someone mentioned to me just in a general conversation, how they were sure the way technology works now-a-days is that all devices are designed to fail within a certain amount of time. This is how they get people to keep buying new devices at a much higher cost. Basically they force people into a corner where they have no other choice but to buy or go without. Looks like the person who told me this was right, as the failure in my case is on square's side, it is their technology that failed me, not the other way around. I did inform that agent that I fully intended to share the information I learned from that telephone call.
