As the title says,
When I try to modify and APP on a site with a custom CSS registered with CSSRegistration:
<SharePoint:CssRegistration name=”<%$SPUrl:~SiteCollection/Style Library/~language/Themable/icapapp.css%>” runat=”server” EnableCssTheming=”true” />
I get the error shown in the title (Exact error as an attachement)
So.. you can get around this on premises by utilising _layouts for me which is bad practice as you never know what an update will include and besides this on 365 so is a no go area. Or of course you don’t use custom themeable css… Which totally lets down the whole themeing concept.
Recap:
- Masterpage on main site has custom themeable css registered WORKS
- Add an App and configure
- App Properties page doesn’t load CSS due to cannot make cache safe URL error
- It is automatically trying to append the hive/~language url to the front
- Could this be a publishing error? SPUrl insufficient in this case?
- Due to site-appid.sharepoint.com address it is attempting to resolve using relative url?
?id=6614983%3AUploadedFile%3A63812
Hi Hugh,
Good question, I remember hitting something similar myself.
What I found is that, in a nutshell, Microsoft did not intend CssRegistration/CssLink to be used for anything other than files in the _Layouts folder. You can see this if you crack open this stuff in Reflector or similar – hopefully the image below will come through:
Cheers,
Chris.
?width=721
