Hi @MariaFulton -
In the past, when I've stumbled upon threads mentioning the "Too Long" error, it's because of the inclusion of images. I've tested this with over 48,000 words on a page (a lot of content!), but other Community Members say that the error goes away after removing images, saving, and then adding them back to the page. I wonder if this would work for you!
Here are some additional threads for context:
https://community.canvaslms.com/t5/Canvas-Question-Forum/Canvas-quot-Too-Long-quot-error-when-editin...
https://community.canvaslms.com/t5/Canvas-Question-Forum/Why-do-I-get-a-quot-too-long-quot-error-whe...
