Can't render

I can't render literally ANY photo on Lightroom, it just randomly blocked the "export" button. I need some answers, asap: my work depends on solutions now (I don't wanna lose my job).

There is the necessary amount of cash on the card where the bill is sent, the program is up to date. There are no other apps running while I use LR, and I also checked that my user is logged on.

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