We looking into this issue, will update you soon. Please add version details.
I’m having the same trouble. I have WP version 4.2.2 and WP Ulimate CSV Importer version 3.7.4. I upload the file fine and click next. The page says Import Data Configuration but it is blank. If I click on the refresh button on my browser, it will show me 2 blue arrows and in between them says ‘showing preview of row#1’ and to the right of the right blue button is ‘Go to Row#’ with a box and then a green button that says ‘show’. Below all that it says CSV Header, WP Fields, CSV Row. Below that is the clear mapping and next buttons. There are no fields to map and no space for them to even be there. I used this last week and it was fine, now this week, it won’t work.
Please try an import without uploading zip file. This may be because of ZipArchive class which supports only for above php 5.2. Ensure that your php is above 5.2 and kindly share more details on your php.info.
I’m not uploading a zip file, just a regular csv file of 88kb. I had the more experienced guy reset the PHP server but that didn’t change anything. At this point we are switching to a different plug in because my whole site is on hold with this mess. I’m not a programmer. I am the novice user and I write basic html code to get my pages up. When something like this happens, I have to seek the help of those more experienced.
