Sitemap page load error: DOMDocument::loadHTML(): Empty string supplied as input

[christoph-petzold]

When loading https://www.tanz-balance-magdeburg.de/sitemap i get an error:

DOMDocument::loadHTML(): Empty string supplied as input

You can see the detailed debug output when calling the URL.

This is the same when loading a page with empty content using the gantry5 helium theme. I have already opend an issue at grav-plugin-sitemap.

My google console shows that the site map was read last on 1/23/18.

[christoph-petzold]

Same as: #grav-plugin-image-captions/issues/1

Reason is here:
#getgrav/grav#1771

Solution: either disable the image-captions plugin or use this commit.