Fab Plugin Does Not Load In 1 Project (Blank Window)

Summary

The Fab Plugin has completely stopped working in 1 project. Suspecting it was an issue with 5.4, I updated to 5.5 and the issue still persists.
It is not showing a Fab Logo, the plugin window actually opens but there is no content, just a blank window.
I started a new 5.5 Project and was able to open the fab plugin window.
How can I fix the Fab plugin without creating a whole new project?

What type of bug are you experiencing?

Plugins

Steps to Reproduce

Open Unreal Project
Click Window > Fab

Expected Result

Fab Plugin shows something other than a blank window

Observed Result

The window does not load anything, a blank window is shown.

Platform

Windows, Unreal Editor

Operating System

Windows 10

I was able to fix the problem by deleting the “webcache_4430” folder located in project root/Saved

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