Dendron

a common cause is that the frontmatter title is a number instead of a string. can you see if you have any frontmatter that are in the form of `title: {number}`? 
also - what version of dendron are you running?

I will check the frontmatter title. I'm running v0.91.0

Still getting the same error. Does the title require quotation marks if it contains multiple words. I had a few numbers as title but with simple quotation marks around. I do have quite a few title of multiple words separated by a space without quotation marks.

forget what I said, when I run the Doctor it removes the simple quotation marks from the title.

It shouldn't, we've seen issues with titles or IDs starting with numbers, like `title: 01`. We have some fixes for this already, but maybe they are not fully covered.

It can, but I think it needs to be in quotes if it is

Ah, neither titles should start with numbers. I do have quite a few titles starting with numbers but containing a word.

But Doctor removes quotation marks from both ID and Title.

So non of the stuff mentioned above are the issues. I'm looking at frontmatter from different files trying to see which could cause the issue.

so its hard to pin point the issue as is - will look to adding some additional logging here to make this easier to diagnose

So I found out that this error 
```
LaTeX-incompatible input and strict mode is set to 'warn': In LaTeX, \\ or \newline does nothing in display mode [newLineInDisplayMode]
```
was due to some LaTex/MathJax expressions. The error  though doesn't prevent the build, you can still publish. 

I'll continue to look into the other errors.

So the rest of the error was because I had HTML elements in the .md file, like this `<input type="text">`. They were not in quotation marks.