Intermittently not working

For the last few days, infuse 6 has intermittently stopped working for no apparent reason. I get a spinny and then an error message (pic). Not sure if this is related, but the app also has a restore button on the sales page. I click it and it says thanks, but then next time I go there it wants me to restore again. (Pic 2) Everything else on my phone is working fine and I can access my videos on other apps. Using iPhone 6s Plus with iOS 12.4.1