Warning: Error in if: argument is of length zero

[StarXian]

When I want to make the volcano plot, I load the DEA file, but the a is crashing,and leave the message.

[HanbingWwande98]

Same problem

[sears13]

I have the same problem. I used the DEA analysis tab to get me DEA file, but it won't let me upload the DEA.csv file. Everything crashes and R gives me the same error message.