Exporting Jpeg to 300 ppi was working yesterday but not working anymore

[Merz2202616680dl]

Hi! so i was able to export vectors to Jpeg with 300ppi high res before but now it's not working and it always says that i should lower the resolution but to no avail.. i don't understad what's happening and my work requires a high res Jpeg. what am i missing?

[Doug A Roberts]

What size in pixels is the document you are trying to export?

[Ton Frederiks]

What is the size of your document?