I've had a very similar problem, same blinking light after taking a still image & unable to view the image/write image to card etc I've always used it tethered in studio & forgot that I changed a connection setting in the setup menu when I first got the camera, basically Setup > Connection setting > connection mode > & select as needed, switching from Tether Shooting Fixed to Tether shooting Auto, sorted it for me & thankfully no need to return as faulty etc  

Hi. Sorry to hear you have the same issue. But also good to know it’s not just me as many have suggested! There is definitely an issue with Nisi. I just ordered and received the Nisi square hood and filter adaptor which they have updated their website to say is compatible BUT it’s not! I have now been asked by them to submit video of the error to their WhatsApp customer service number and they are looking into it. If you have WhatsApp and want to do the same so they might actually realise there is a problem their customer service team are on +44 7723 860624 (WhatsApp).  Here’s a photo showing their filter thread v other companies filter adaptor. Nisi on the left. Clearly not enough room for the lens to move

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I get the error as well with the Nisi all in one kit on my x100vi. It’s because the lens touches the built in UV filter when focusing at minimum distance. I love the kit, but it’s disappointing because it was quite expensive and I don’t want to use it and damage the camera

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Hi there , im newbie here , just brough a Fuji Xt30 . hope to learn new stuff here . Elizabeth