My students noticed that my article had not been uploaded as a whole and therefore there are some parts missing from the end + the references. How can I correct this and add them once the article has already been published in ResearchGate?
You should first remove the incomplete file and then upload the complete version. For instructions how to remove, see "How to make content private or remove it", https://help.researchgate.net/hc/en-us/articles/14293099743121.