I have been successfully using the React CMS Boilerplate to upload a custom React Module in Hubspot. Recently, I went to do some updates on the module and I’m getting this error
Uncaught SyntaxError: Invalid or unexpected token
in the minified main.js file (this file is autogenerated and I can not edit it). The error appears to be on the very last line of the minified file which is
`\#sourceURL=https://f.hubspotusercontent00.net/hubfs/{myHubspotID}/raw_assets/public/{myHubspotFolder}/main.js``
I have not experienced this error ever before so I’m wondering if something changed with how Hubspot builds the minified files? I did control tests and use the exact same code that worked previously and saw the same error today. Also I will note that the uploading process has no errors. I’m only seeing the error when I drag my module onto our page. That is where it crashes.
Hi @SaraRandolph
Welcome to the Community and thank you for the information provided!
I’ll tag a few of our wizards that can share their knowledge with you 
Hey @Kevin-C @Gonzalo @DanielSanchez any advice you can give to @SaraRandolph?
Thanks
Sharon
Hey @SaraRandolph
A shot in the dark here, but…
I believe a sourceURL is supposed to be designated with two forward slashes rather than two back slashes.
This would account for the
Uncaught SyntaxError: invalid escape sequence error
thrown in FF.
But because that’s causing an error with the source mapping I’m not sure I can tell where this is happening. If this is in fact the issue.
EDIT:
If you can get into that fileafter the production build and remove that line all together it might work.
Thank you Kevin! I ended up chatting with a developer on the Hubspot slack asking how I could update that file and he pushed up a fix for the issue!