Plugin install on multi-site instance causing broken permalinks

Hello – I have a multi-site instance of WordPress and had some users who requested we install this plugin to resolve an issue they were having passing credentials to the API. When we installed the plugin we saw that many posts and links on the various blog pages hosted in this instance became unresolveable (404). All the data is still there, I can still see the posts and edit them, but when I click on the permalink they do not resolve. I have thousands of users complaining about this. Has anyone experiencd this before?

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