Fluid Template doesn't load - typo3

Question

I'm building a site with Fluid Template. I have created two different front-end layouts and two different back-end layout but I always get this error #1288085266: No template has been specified. Use either setTemplateSource() or setTemplatePathAndFilename(). Accordingly to Typo3 Wiki this should be a solution Exception/CMS/1288085266
but not in my case. This is my code:
config.doctype = html5
page = PAGE
page {
includeCSSLibs.bootstrap = https://maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css
includeCSS.style = fileadmin/templates/rka2015/css/style.css
includeJSlibs.jquery = https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js
includeJSlibs.bootstrap = https://maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js
includeJS.custom = fileadmin/templates/rka2015/js/custom.js
}
page.10 = FLUIDTEMPLATE
page.10 {
file = fileadmin/templates/rka2015/layouts/main_layout.html
layoutRootPath = fileadmin/templates/rka2015/layouts/
patialRootPath = fileadmin/templates/rka2015/partials/
variables {
siteName = TEXT
siteName.value = rka2015
contentMain < styles.content.get
contentMain.select.where = colPos = 0
content_column_1 < styles.content.get
content_column_1.select.where = colPos = 1
content_column_2 < styles.content.get
content_column_2.select.where = colPos = 2
}
}
page.10.file.stdWrap.cObject = CASE
page.10.file.stdWrap.cObject
{
key.data = levelfield:-1, backend_layout_next_level, slide
key.override.field = backend_layout
default = TEXT
default.value = fileadmin/templates/rka2015/main_1_column.html
1 = TEXT
1.value = fileadmin/templates/rka2015/main_1_column.html
2 = TEXT
2.value = fileadmin/templates/rka2015/main_2_column.html
}
I have already checked all; section name is OK, ID for back-end layouts are ok, template is defined, everything seem to be as it should be. I really don't have a clue where else to search.
UPDATE!!!
Seems like there is a problem with a file path. I am running my site on a subdomain and it looks like that ts doesn't find the file paths if they are defined only as fileadmin/... Any thoughts? Thanks
SOLUTION!
page {
includeCSSLibs.bootstrap = https://maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css
includeCSS.style = fileadmin/templates/rka2015/css/style.css
includeJSlibs.jquery = https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js
includeJSlibs.jquery.external = 1
includeJSlibs.bootstrap = https://maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js
includeJS.custom = fileadmin/templates/rka2015/js/custom.js
}
page.10 = FLUIDTEMPLATE
page.10 {
template = CASE
template {
key.data = levelfield:-1,backend_layout_next_level,slide
key.override.field = backend_layout
1 = FILE
1.file = fileadmin/templates/rka2015/main_1_column.html
2 = FILE
2.file = fileadmin/templates/rka2015/main_2_column.html
}
partialRootPath = fileadmin/templates/rka2015/partials/
layoutRootPath = fileadmin/templates/rka2015/layouts/
variables {
siteName = TEXT
siteName.value = rka2015
contentMain < styles.content.get
contentMain.select.where = colPos = 0
content_column_1 < styles.content.get
content_column_1.select.where = colPos = 1
content_column_2 < styles.content.get
content_column_2.select.where = colPos = 2
}
}

Answer 1

First, check out if TYPO3 can read the file by overwriting the page object by appending this to the end of your template:
page.10 >
page.10 = FILE
page.10.file = fileadmin/templates/rka2015/layouts/main_layout.html
If that doesn't generate a page with the raw, uninterpreted output of your template file, then theres something wrong with either the file path or file permissions.
Secondly, in Fluid, Templates and Layouts are different things with different uses and should propably not be put into the same directory.
Most importantly, theres something wrong with the backend layout switch you're trying to build with the CASE in page.10.file.stdWrap.cObject . You see, the stdWrap object actually wraps around the text you've already set. If stdWrap cant find a pipe to figure out how to wrap, it just appends instead. Remove the line where you set the file in the top part and only leave the stdWrap case and you should be good to go.

Answer 2

at the first look it looks right... but check your file paths, maybe they are wrong as "Jost" commented.
i'm not sure but i think the problem is that the template path (file = ...) is the same as layout root path...
by the way... if you include external styles and javascripts you need to set something like the follows i think...
includeJSlibs.jquery = https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js
includeJSlibs.jquery.external = 1