I'm working with two different sites, one where the composed looks are displayed and the change the look function works as it should. On the other site the https://TENANT.sharepoint.com/sites/SITENAME/_layouts/15/designgallery.aspx page is blank, or rather the div #DeltaPlaceHolderMain appears empty.
The consol displays the following error:
Failed to load resource: net::ERR_FAILED
I get the following from https://config.fp.measure.office.com/conf/v2/o365se/fpconfig.min.json?monitorId=O365se
{"s":1000,"n":3,"e":[{"e":"*.fp.measure.office.com","w":1000000,"m":128},{"e":"graph-next.fp.measure.office.com","w":4,"m":128},{"e":"outlook.office.com","w":20,"m":128},{"e":"outlook.office365.com","w":20,"m":128},{"e":"ow1.res.office365.com","w":20,"m":1},{"e":"pp1.prd.attend.teams.microsoft.com","w":1,"m":128},{"e":"pp1.prd.bmc.teams.microsoft.com","w":1,"m":128},{"e":"tr-ofc-afdwac.office.com","w":10,"m":128},{"e":"tr-ofc-atm.office.com","w":10,"m":128},{"e":"tr-ofc-fs.office.com","w":10,"m":128},{"e":"tr-ofc-mira.office.com","w":10,"m":128},{"e":"tr-ooc-acdc.office.com","w":20,"m":128},{"e":"tr-ooc-acdcatm.office.com","w":12,"m":128},{"e":"tr-ooc-atm.office.com","w":20,"m":128},{"e":"tr-ooc-fs.office.com","w":4,"m":128},{"e":"tr-ooc-geo.office.com","w":4,"m":128}],"r":["upload.fp.measure.office.com/r.gif","upload.fp.measure.office.com/r.gif","upload2.fp.measure.office.com/r.gif"]}
I've tried to compare the two pages to see where the problem in the code is, but can't for the life of me figure out why it doesn't work.
I have added the composed look in the web designer gallery https://TENANT.sharepoint.com/sites/SITENAME/_catalogs/design/AllItems.aspx and the spfont and spcolor files here _catalogs/theme/Forms/Themes%20ID.aspx.
How do I go about finding the error?