Here is a hypothetical situation. You're trying to write a post along with an image on a website. So you added an image file while writing, and clicked the submit button. But the image doesn't show and you don't get why it doesn't show. Here, is the sentence below correct to describe this error you are not sure of?
The image was not uploaded due to an uncertain error.
I am uncertain whether the use of uncertain is correct in the above sentence, because the Oxford Advanced Learner's Dictionary covers the adj. uncertain as follows.
- [not before noun] uncertain (about/of something) feeling doubt about something; not sure
- likely to change, especially in a negative or unpleasant way
- not definite or decided
(You can see multiple example sentences for each meaning in the link. For conciseness, I only added meaning definitions.)
It seems to me that the first meaning is the one that matches this context. But, it says it cannot be used before a noun, meaning the sentence is incorrect. What is the truth?