Attach files is unvailable

Hello, I encountered a bug. While learning physics in ChatGPT 4o mini I spotted that I can not upload any more files. I mean photos. It says:
Attach files is unavailable. It does not matter what form of file it is. However, I can upload files to different conversations and everything seems all right. Why is that? Yeah, the conversation is big, but I uploaded only one screenshot and I do have ChatGPT PRO.

Also in the one that I can not attach files works a lot slower than the other. Although we have a large conversation in there, but there is no other way for me to learn needed subject.

I will provide screenshots as a evidence of problem that I encountered.
First one is about the problem and the second will show that I can upload files in different conversations.

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Same here. OCR function is also not working. If they cannot fix it, I will just move to Google Gemini. At least Google is working.

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the same thing happend today

I found how to fix it. Relogin

Hi everyone,

I’m having trouble getting ChatGPT to read files. Whenever I try to upload a document, it just gives me a blank response and tells me to enter the text manually. All the input options seem to be there, but nothing happens.

Has anyone else experienced this issue? I’m located in Tallinn, Estonia.