Sharepoint Upload Consistently Failing

We have found that the post action of a Sharepoint Upload will consistently fail when Clarity is attempting to access it simultaneously on multiple machines. This is unfortunately likely a limitation of Microsoft but, looking at the attached image, all 4 tasks were started at the same time and ran on 4 different machines (1 task assigned to 4 models). The task that happened to finish first, got first access to Sharepoint and the other three failed because they were not able to access the site.

4 Clarity users all trying to access the same Sharepoint folder from 4 different machines. First one wins, all others fail.