I have the same problem and have been ready to file for weeks. I found 3 forms for business credits that are still not available on turbotax, but none of them apply to my business. I deleted them from my forms and still receive the message. I spoke to two different representatives today. The resolution I was given was that I'll just have to wait or file by paper. I was also told that the error was due to an update needed to Schedule C, but Schedule C shows as ready for print and e-file on turbotax's form page here. You can also see the three business credit forms that aren't ready (Form 8881, Form 3800, and Form 3468) which now show a date of 3/6/24. This is getting ridiculous. At this point, I don't care which form is causing the error; just fix it.
