Input size limit

[DelongZHOU]

Hello,
I'm uploading a GO enrichment table and using the mouse background table from the example data.

For one experiment,
When I use the first 700 entries, it works; then I submitted only entries 701-1000, and it works as well.
However when I submit the combined 1-1000 entries, it gives error "Something went wrong. Please check your input files!"
For this experiment in particular I have about 3000 entries.
I tried another experiment where I have 600 entries, but got the same error as above.

As the 1000 entries can be processed when broken down, I believe my data format is correct.
Is there a cap for the entry size? Does it depend on my system or the server capasity? Is there a way to increase the cap?

Thank you!

[DelongZHOU]

In addition, when the tool does return a result page, I am unable to download the plots - click on the download icon only slows down the webpage and after some time the browser suggests the page is taking too much resource and should be killed.
Also, I found that do not check "Propagate background" usually improves the performance. However, I am not sure whether that's recommanded with the example background.
I'm using Win10, 4 core i5 processor, 16G mem. I tried Chrome, Firefox and Edge, virtually same behavior. I monitored the resource consumption using task manager, it never reached more than 70% CPU or memory usage.