Ensuring VBA Update Doesn't Break Functions

[YRSTRULY]

Please advice, when brining in or making changes to VBA Code, which measures must i take to prevent the new code from breaking the fom.

I have a form and im trying to upload data. Everytime i run the code im prompted with two form amendments. If i click either or one, then somehow my forms function break, like back or exit buttons dont work anymore. Please see screenshots.
https://docs.google.com/document/d/1...f=true&sd=true

[6StringJazzer]

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