Updating steam extracting package
This seems to be resolved by this suggestion from user Elysian Mod: 02.What most recently changed (as far as what you have deliberately done to your game is concerned: New, updated, or removed mods or plugins)? Did any of the following which interact with the game get updated or changed recently.You will need to update it from NMM on Git Hub or this Nexus NMM download page.
This a collection of specific common problems and solutions, along with a general checklist of things known to contribute to problems, collected from around the web.
Standard list of things to ask yourself about your current FNV problem: 00.
Did you install Steam under the default location of the "C:\Program Files" tree?
Note: this "fix" reverts to using the older, unsecure API at a fixed, no longer used IP address (instead of the address returned using DNS), and thus negates the EU GDPR standard.
It could get shutdown without warning 25 May or after as that is the EU deadline for compliance and Nexus is hosted in the United Kingdom. Some people are finding that even after updating NMM to v0.65.4 they still get a "script exception" message when installing some mods (such as UIO and MCM).