imsmanifest.xml file issues in SCORM 1.2 export

better to use the Storyline zip function but if you forget always zip the contents and not the folder

Maybe this could help:
https://help.talentlms.com/hc/en-us/articles/360014657733-What-to-do-when-you-get-a-This-is-not-a-valid-SCORM-file-error-message

Also, in File Explorer under View, in the Show/hide group, select the File name extensions check box. I am sure the imsmanifest extension will show.

Hi Nedim - Changing that setting in File Explorer seems to have resolved it. Thank you!! I never would have thought of that.

You are welcome, Laura. Glad it worked. 

That wouldn't resolve the issue though just show you the extension, the issue I think is you zipped the folder and not the contents.

What I suspect happened is that Laura initially noticed the manifest file had no extension (imsmanifest). Upon renaming it to imsmanifest.xml, it inadvertently resulted in imsmanifest.xml.xml, rendering it invalid.

Possible, i read she zipped it and uploaded and got the invalid message before she renamed.